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Finding the Fourth Proportional to 72,509.60, 100,064.22 and 40,676.60

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Solution

The fourth proportional to 72,509.60, 100,064.22 and 40,676.60 is: 56,134.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,509.60 : 100,064.22 = 40,676.60 : x
  2. Step 2: Convert to fraction form
    72,509.60/100,064.22 = 40,676.60/x
  3. Step 3: Cross multiply
    72,509.60x = 100,064.22 × 40,676.60
  4. Step 4: Simplify right side
    72,509.60x = 4,070,272,251.25
  5. Step 5: Solve for x
    x = 4,070,272,251.25/72,509.60
  6. Step 6: Final answer
    x = 56,134.25

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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.