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Finding the Fourth Proportional to 101,520.62, 140,037.15 and 65,209.83

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Solution

The fourth proportional to 101,520.62, 140,037.15 and 65,209.83 is: 89,950.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,520.62 : 140,037.15 = 65,209.83 : x
  2. Step 2: Convert to fraction form
    101,520.62/140,037.15 = 65,209.83/x
  3. Step 3: Cross multiply
    101,520.62x = 140,037.15 × 65,209.83
  4. Step 4: Simplify right side
    101,520.62x = 9,131,799,646.15
  5. Step 5: Solve for x
    x = 9,131,799,646.15/101,520.62
  6. Step 6: Final answer
    x = 89,950.20

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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.