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Finding the Fourth Proportional to 53,489.80, 80,234.70 and 52,712.20

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Solution

The fourth proportional to 53,489.80, 80,234.70 and 52,712.20 is: 79,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,489.80 : 80,234.70 = 52,712.20 : x
  2. Step 2: Convert to fraction form
    53,489.80/80,234.70 = 52,712.20/x
  3. Step 3: Cross multiply
    53,489.80x = 80,234.70 × 52,712.20
  4. Step 4: Simplify right side
    53,489.80x = 4,229,347,553.34
  5. Step 5: Solve for x
    x = 4,229,347,553.34/53,489.80
  6. Step 6: Final answer
    x = 79,068.30

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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.