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Finding the Fourth Proportional to 82,479.60, 123,719.40 and 52,930.80

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Solution

The fourth proportional to 82,479.60, 123,719.40 and 52,930.80 is: 79,396.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,479.60 : 123,719.40 = 52,930.80 : x
  2. Step 2: Convert to fraction form
    82,479.60/123,719.40 = 52,930.80/x
  3. Step 3: Cross multiply
    82,479.60x = 123,719.40 × 52,930.80
  4. Step 4: Simplify right side
    82,479.60x = 6,548,566,817.52
  5. Step 5: Solve for x
    x = 6,548,566,817.52/82,479.60
  6. Step 6: Final answer
    x = 79,396.20

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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.