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Finding the Fourth Proportional to 80,113.17, 120,170.16 and 20,948.97

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Solution

The fourth proportional to 80,113.17, 120,170.16 and 20,948.97 is: 31,423.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,113.17 : 120,170.16 = 20,948.97 : x
  2. Step 2: Convert to fraction form
    80,113.17/120,170.16 = 20,948.97/x
  3. Step 3: Cross multiply
    80,113.17x = 120,170.16 × 20,948.97
  4. Step 4: Simplify right side
    80,113.17x = 2,517,441,076.74
  5. Step 5: Solve for x
    x = 2,517,441,076.74/80,113.17
  6. Step 6: Final answer
    x = 31,423.56

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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.