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Finding the Fourth Proportional to 87,999.60, 131,891.40 and 59,919.60

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Solution

The fourth proportional to 87,999.60, 131,891.40 and 59,919.60 is: 89,805.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,999.60 : 131,891.40 = 59,919.60 : x
  2. Step 2: Convert to fraction form
    87,999.60/131,891.40 = 59,919.60/x
  3. Step 3: Cross multiply
    87,999.60x = 131,891.40 × 59,919.60
  4. Step 4: Simplify right side
    87,999.60x = 7,902,879,931.44
  5. Step 5: Solve for x
    x = 7,902,879,931.44/87,999.60
  6. Step 6: Final answer
    x = 89,805.86

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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.