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Finding the Fourth Proportional to 72,375.44, 99,876.67 and 40,109.39

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Solution

The fourth proportional to 72,375.44, 99,876.67 and 40,109.39 is: 55,350.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.44 : 99,876.67 = 40,109.39 : x
  2. Step 2: Convert to fraction form
    72,375.44/99,876.67 = 40,109.39/x
  3. Step 3: Cross multiply
    72,375.44x = 99,876.67 × 40,109.39
  4. Step 4: Simplify right side
    72,375.44x = 4,005,991,609.00
  5. Step 5: Solve for x
    x = 4,005,991,609.00/72,375.44
  6. Step 6: Final answer
    x = 55,350.15

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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.