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Finding the Fourth Proportional to 87,630.70, 131,446.05 and 66,894.70

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Solution

The fourth proportional to 87,630.70, 131,446.05 and 66,894.70 is: 100,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,630.70 : 131,446.05 = 66,894.70 : x
  2. Step 2: Convert to fraction form
    87,630.70/131,446.05 = 66,894.70/x
  3. Step 3: Cross multiply
    87,630.70x = 131,446.05 × 66,894.70
  4. Step 4: Simplify right side
    87,630.70x = 8,793,044,080.94
  5. Step 5: Solve for x
    x = 8,793,044,080.94/87,630.70
  6. Step 6: Final answer
    x = 100,342.05

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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.