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Finding the Fourth Proportional to 87,287.70, 130,913.04 and 39,889.32

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Solution

The fourth proportional to 87,287.70, 130,913.04 and 39,889.32 is: 59,825.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,287.70 : 130,913.04 = 39,889.32 : x
  2. Step 2: Convert to fraction form
    87,287.70/130,913.04 = 39,889.32/x
  3. Step 3: Cross multiply
    87,287.70x = 130,913.04 × 39,889.32
  4. Step 4: Simplify right side
    87,287.70x = 5,222,032,144.73
  5. Step 5: Solve for x
    x = 5,222,032,144.73/87,287.70
  6. Step 6: Final answer
    x = 59,825.52

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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.