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Finding the Fourth Proportional to 84,498.60, 126,747.90 and 53,471.40

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Solution

The fourth proportional to 84,498.60, 126,747.90 and 53,471.40 is: 80,207.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,498.60 : 126,747.90 = 53,471.40 : x
  2. Step 2: Convert to fraction form
    84,498.60/126,747.90 = 53,471.40/x
  3. Step 3: Cross multiply
    84,498.60x = 126,747.90 × 53,471.40
  4. Step 4: Simplify right side
    84,498.60x = 6,777,387,660.06
  5. Step 5: Solve for x
    x = 6,777,387,660.06/84,498.60
  6. Step 6: Final answer
    x = 80,207.10

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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.