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Finding the Fourth Proportional to 87,978.80, 131,881.80 and 43,612.40

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Solution

The fourth proportional to 87,978.80, 131,881.80 and 43,612.40 is: 65,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,978.80 : 131,881.80 = 43,612.40 : x
  2. Step 2: Convert to fraction form
    87,978.80/131,881.80 = 43,612.40/x
  3. Step 3: Cross multiply
    87,978.80x = 131,881.80 × 43,612.40
  4. Step 4: Simplify right side
    87,978.80x = 5,751,681,814.32
  5. Step 5: Solve for x
    x = 5,751,681,814.32/87,978.80
  6. Step 6: Final answer
    x = 65,375.77

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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.