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Finding the Fourth Proportional to 71,761.56, 99,030.24 and 39,929.91

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Solution

The fourth proportional to 71,761.56, 99,030.24 and 39,929.91 is: 55,102.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,761.56 : 99,030.24 = 39,929.91 : x
  2. Step 2: Convert to fraction form
    71,761.56/99,030.24 = 39,929.91/x
  3. Step 3: Cross multiply
    71,761.56x = 99,030.24 × 39,929.91
  4. Step 4: Simplify right side
    71,761.56x = 3,954,268,570.48
  5. Step 5: Solve for x
    x = 3,954,268,570.48/71,761.56
  6. Step 6: Final answer
    x = 55,102.88

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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.