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Finding the Fourth Proportional to 101,708.56, 140,353.68 and 56,387.20

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Solution

The fourth proportional to 101,708.56, 140,353.68 and 56,387.20 is: 77,812.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,708.56 : 140,353.68 = 56,387.20 : x
  2. Step 2: Convert to fraction form
    101,708.56/140,353.68 = 56,387.20/x
  3. Step 3: Cross multiply
    101,708.56x = 140,353.68 × 56,387.20
  4. Step 4: Simplify right side
    101,708.56x = 7,914,151,024.90
  5. Step 5: Solve for x
    x = 7,914,151,024.90/101,708.56
  6. Step 6: Final answer
    x = 77,812.04

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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.