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Finding the Fourth Proportional to 80,755.76, 121,153.90 and 47,503.64

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Solution

The fourth proportional to 80,755.76, 121,153.90 and 47,503.64 is: 71,267.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,755.76 : 121,153.90 = 47,503.64 : x
  2. Step 2: Convert to fraction form
    80,755.76/121,153.90 = 47,503.64/x
  3. Step 3: Cross multiply
    80,755.76x = 121,153.90 × 47,503.64
  4. Step 4: Simplify right side
    80,755.76x = 5,755,251,250.20
  5. Step 5: Solve for x
    x = 5,755,251,250.20/80,755.76
  6. Step 6: Final answer
    x = 71,267.38

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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.