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Finding the Fourth Proportional to 101,505.71, 140,141.41 and 65,221.79

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Solution

The fourth proportional to 101,505.71, 140,141.41 and 65,221.79 is: 90,046.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,505.71 : 140,141.41 = 65,221.79 : x
  2. Step 2: Convert to fraction form
    101,505.71/140,141.41 = 65,221.79/x
  3. Step 3: Cross multiply
    101,505.71x = 140,141.41 × 65,221.79
  4. Step 4: Simplify right side
    101,505.71x = 9,140,272,749.56
  5. Step 5: Solve for x
    x = 9,140,272,749.56/101,505.71
  6. Step 6: Final answer
    x = 90,046.88

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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.