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Finding the Fourth Proportional to 101,711.28, 140,321.52 and 63,448.56

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Solution

The fourth proportional to 101,711.28, 140,321.52 and 63,448.56 is: 87,534.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,711.28 : 140,321.52 = 63,448.56 : x
  2. Step 2: Convert to fraction form
    101,711.28/140,321.52 = 63,448.56/x
  3. Step 3: Cross multiply
    101,711.28x = 140,321.52 × 63,448.56
  4. Step 4: Simplify right side
    101,711.28x = 8,903,198,381.01
  5. Step 5: Solve for x
    x = 8,903,198,381.01/101,711.28
  6. Step 6: Final answer
    x = 87,534.03

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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.