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Finding the Fourth Proportional to 87,422.40, 131,036.40 and 48,007.80

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Solution

The fourth proportional to 87,422.40, 131,036.40 and 48,007.80 is: 71,958.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,422.40 : 131,036.40 = 48,007.80 : x
  2. Step 2: Convert to fraction form
    87,422.40/131,036.40 = 48,007.80/x
  3. Step 3: Cross multiply
    87,422.40x = 131,036.40 × 48,007.80
  4. Step 4: Simplify right side
    87,422.40x = 6,290,769,283.92
  5. Step 5: Solve for x
    x = 6,290,769,283.92/87,422.40
  6. Step 6: Final answer
    x = 71,958.32

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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.