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Finding the Fourth Proportional to 84,819.60, 127,229.40 and 76,363.20

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Solution

The fourth proportional to 84,819.60, 127,229.40 and 76,363.20 is: 114,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,819.60 : 127,229.40 = 76,363.20 : x
  2. Step 2: Convert to fraction form
    84,819.60/127,229.40 = 76,363.20/x
  3. Step 3: Cross multiply
    84,819.60x = 127,229.40 × 76,363.20
  4. Step 4: Simplify right side
    84,819.60x = 9,715,644,118.08
  5. Step 5: Solve for x
    x = 9,715,644,118.08/84,819.60
  6. Step 6: Final answer
    x = 114,544.80

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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.