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Finding the Fourth Proportional to 72,609,819.12, 100,201,552.56 and 40,014,771.12

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Solution

The fourth proportional to 72,609,819.12, 100,201,552.56 and 40,014,771.12 is: 55,220,385.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,609,819.12 : 100,201,552.56 = 40,014,771.12 : x
  2. Step 2: Convert to fraction form
    72,609,819.12/100,201,552.56 = 40,014,771.12/x
  3. Step 3: Cross multiply
    72,609,819.12x = 100,201,552.56 × 40,014,771.12
  4. Step 4: Simplify right side
    72,609,819.12x = 4,009,542,191,557,050
  5. Step 5: Solve for x
    x = 4,009,542,191,557,050/72,609,819.12
  6. Step 6: Final answer
    x = 55,220,385.34

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.