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Finding the Fourth Proportional to 85,989.57, 129,034.17 and 36,065.22

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Solution

The fourth proportional to 85,989.57, 129,034.17 and 36,065.22 is: 54,118.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,989.57 : 129,034.17 = 36,065.22 : x
  2. Step 2: Convert to fraction form
    85,989.57/129,034.17 = 36,065.22/x
  3. Step 3: Cross multiply
    85,989.57x = 129,034.17 × 36,065.22
  4. Step 4: Simplify right side
    85,989.57x = 4,653,645,728.57
  5. Step 5: Solve for x
    x = 4,653,645,728.57/85,989.57
  6. Step 6: Final answer
    x = 54,118.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.