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Finding the Fourth Proportional to 72,457.74, 108,717.90 and 39,201.24

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Solution

The fourth proportional to 72,457.74, 108,717.90 and 39,201.24 is: 58,818.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,457.74 : 108,717.90 = 39,201.24 : x
  2. Step 2: Convert to fraction form
    72,457.74/108,717.90 = 39,201.24/x
  3. Step 3: Cross multiply
    72,457.74x = 108,717.90 × 39,201.24
  4. Step 4: Simplify right side
    72,457.74x = 4,261,876,490.20
  5. Step 5: Solve for x
    x = 4,261,876,490.20/72,457.74
  6. Step 6: Final answer
    x = 58,818.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.