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Finding the Fourth Proportional to 87,118.92, 130,629.78 and 42,649.92

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Solution

The fourth proportional to 87,118.92, 130,629.78 and 42,649.92 is: 63,951.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,118.92 : 130,629.78 = 42,649.92 : x
  2. Step 2: Convert to fraction form
    87,118.92/130,629.78 = 42,649.92/x
  3. Step 3: Cross multiply
    87,118.92x = 130,629.78 × 42,649.92
  4. Step 4: Simplify right side
    87,118.92x = 5,571,349,666.62
  5. Step 5: Solve for x
    x = 5,571,349,666.62/87,118.92
  6. Step 6: Final answer
    x = 63,951.09

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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.