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Finding the Fourth Proportional to 87,861.60, 131,878.80 and 43,538.40

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Solution

The fourth proportional to 87,861.60, 131,878.80 and 43,538.40 is: 65,350.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,861.60 : 131,878.80 = 43,538.40 : x
  2. Step 2: Convert to fraction form
    87,861.60/131,878.80 = 43,538.40/x
  3. Step 3: Cross multiply
    87,861.60x = 131,878.80 × 43,538.40
  4. Step 4: Simplify right side
    87,861.60x = 5,741,791,945.92
  5. Step 5: Solve for x
    x = 5,741,791,945.92/87,861.60
  6. Step 6: Final answer
    x = 65,350.41

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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.