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Finding the Fourth Proportional to 87,999.40, 131,999.10 and 60,005.80

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Solution

The fourth proportional to 87,999.40, 131,999.10 and 60,005.80 is: 90,008.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,999.40 : 131,999.10 = 60,005.80 : x
  2. Step 2: Convert to fraction form
    87,999.40/131,999.10 = 60,005.80/x
  3. Step 3: Cross multiply
    87,999.40x = 131,999.10 × 60,005.80
  4. Step 4: Simplify right side
    87,999.40x = 7,920,711,594.78
  5. Step 5: Solve for x
    x = 7,920,711,594.78/87,999.40
  6. Step 6: Final answer
    x = 90,008.70

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1.5x scale

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.