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Finding the Fourth Proportional to 71,752.46, 99,023.13 and 39,921.43

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Solution

The fourth proportional to 71,752.46, 99,023.13 and 39,921.43 is: 55,094.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,752.46 : 99,023.13 = 39,921.43 : x
  2. Step 2: Convert to fraction form
    71,752.46/99,023.13 = 39,921.43/x
  3. Step 3: Cross multiply
    71,752.46x = 99,023.13 × 39,921.43
  4. Step 4: Simplify right side
    71,752.46x = 3,953,144,952.68
  5. Step 5: Solve for x
    x = 3,953,144,952.68/71,752.46
  6. Step 6: Final answer
    x = 55,094.21

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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.