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Finding the Fourth Proportional to 87,117.71, 119,439.72 and 85,543.07

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Solution

The fourth proportional to 87,117.71, 119,439.72 and 85,543.07 is: 117,280.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,117.71 : 119,439.72 = 85,543.07 : x
  2. Step 2: Convert to fraction form
    87,117.71/119,439.72 = 85,543.07/x
  3. Step 3: Cross multiply
    87,117.71x = 119,439.72 × 85,543.07
  4. Step 4: Simplify right side
    87,117.71x = 10,217,239,731.54
  5. Step 5: Solve for x
    x = 10,217,239,731.54/87,117.71
  6. Step 6: Final answer
    x = 117,280.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.