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Finding the Fourth Proportional to 55,129.60, 82,694.40 and 52,979.20

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Solution

The fourth proportional to 55,129.60, 82,694.40 and 52,979.20 is: 79,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,129.60 : 82,694.40 = 52,979.20 : x
  2. Step 2: Convert to fraction form
    55,129.60/82,694.40 = 52,979.20/x
  3. Step 3: Cross multiply
    55,129.60x = 82,694.40 × 52,979.20
  4. Step 4: Simplify right side
    55,129.60x = 4,381,083,156.48
  5. Step 5: Solve for x
    x = 4,381,083,156.48/55,129.60
  6. Step 6: Final answer
    x = 79,468.80

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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.