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Finding the Fourth Proportional to 101,278.27, 139,765.48 and 55,957.30

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Solution

The fourth proportional to 101,278.27, 139,765.48 and 55,957.30 is: 77,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,278.27 : 139,765.48 = 55,957.30 : x
  2. Step 2: Convert to fraction form
    101,278.27/139,765.48 = 55,957.30/x
  3. Step 3: Cross multiply
    101,278.27x = 139,765.48 × 55,957.30
  4. Step 4: Simplify right side
    101,278.27x = 7,820,898,404.70
  5. Step 5: Solve for x
    x = 7,820,898,404.70/101,278.27
  6. Step 6: Final answer
    x = 77,221.88

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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.