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Finding the Fourth Proportional to 84,892.20, 127,079.10 and 66,229.80

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Solution

The fourth proportional to 84,892.20, 127,079.10 and 66,229.80 is: 99,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,892.20 : 127,079.10 = 66,229.80 : x
  2. Step 2: Convert to fraction form
    84,892.20/127,079.10 = 66,229.80/x
  3. Step 3: Cross multiply
    84,892.20x = 127,079.10 × 66,229.80
  4. Step 4: Simplify right side
    84,892.20x = 8,416,423,377.18
  5. Step 5: Solve for x
    x = 8,416,423,377.18/84,892.20
  6. Step 6: Final answer
    x = 99,142.48

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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.