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Finding the Fourth Proportional to 87,625.60, 131,438.40 and 66,630.40

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Solution

The fourth proportional to 87,625.60, 131,438.40 and 66,630.40 is: 99,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,625.60 : 131,438.40 = 66,630.40 : x
  2. Step 2: Convert to fraction form
    87,625.60/131,438.40 = 66,630.40/x
  3. Step 3: Cross multiply
    87,625.60x = 131,438.40 × 66,630.40
  4. Step 4: Simplify right side
    87,625.60x = 8,757,793,167.36
  5. Step 5: Solve for x
    x = 8,757,793,167.36/87,625.60
  6. Step 6: Final answer
    x = 99,945.60

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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.