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Finding the Fourth Proportional to 87,136.40, 130,834.20 and 67,437.20

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Solution

The fourth proportional to 87,136.40, 130,834.20 and 67,437.20 is: 101,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,136.40 : 130,834.20 = 67,437.20 : x
  2. Step 2: Convert to fraction form
    87,136.40/130,834.20 = 67,437.20/x
  3. Step 3: Cross multiply
    87,136.40x = 130,834.20 × 67,437.20
  4. Step 4: Simplify right side
    87,136.40x = 8,823,092,112.24
  5. Step 5: Solve for x
    x = 8,823,092,112.24/87,136.40
  6. Step 6: Final answer
    x = 101,256.10

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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.