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Finding the Fourth Proportional to 96,872.20, 145,308.30 and 84,819.40

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Solution

The fourth proportional to 96,872.20, 145,308.30 and 84,819.40 is: 127,229.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,872.20 : 145,308.30 = 84,819.40 : x
  2. Step 2: Convert to fraction form
    96,872.20/145,308.30 = 84,819.40/x
  3. Step 3: Cross multiply
    96,872.20x = 145,308.30 × 84,819.40
  4. Step 4: Simplify right side
    96,872.20x = 12,324,962,821.02
  5. Step 5: Solve for x
    x = 12,324,962,821.02/96,872.20
  6. Step 6: Final answer
    x = 127,229.10

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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.