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Finding the Fourth Proportional to 143,841.57, 215,612.65 and 80,568.92

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Solution

The fourth proportional to 143,841.57, 215,612.65 and 80,568.92 is: 120,769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,841.57 : 215,612.65 = 80,568.92 : x
  2. Step 2: Convert to fraction form
    143,841.57/215,612.65 = 80,568.92/x
  3. Step 3: Cross multiply
    143,841.57x = 215,612.65 × 80,568.92
  4. Step 4: Simplify right side
    143,841.57x = 17,371,678,988.58
  5. Step 5: Solve for x
    x = 17,371,678,988.58/143,841.57
  6. Step 6: Final answer
    x = 120,769.53

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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.