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Finding the Fourth Proportional to 101,542.50, 140,109.21 and 65,727.54

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Solution

The fourth proportional to 101,542.50, 140,109.21 and 65,727.54 is: 90,691.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,542.50 : 140,109.21 = 65,727.54 : x
  2. Step 2: Convert to fraction form
    101,542.50/140,109.21 = 65,727.54/x
  3. Step 3: Cross multiply
    101,542.50x = 140,109.21 × 65,727.54
  4. Step 4: Simplify right side
    101,542.50x = 9,209,033,704.64
  5. Step 5: Solve for x
    x = 9,209,033,704.64/101,542.50
  6. Step 6: Final answer
    x = 90,691.42

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1.5x scale

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.