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Finding the Fourth Proportional to 67,281.30, 100,808.55 and 53,187.30

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Solution

The fourth proportional to 67,281.30, 100,808.55 and 53,187.30 is: 79,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,281.30 : 100,808.55 = 53,187.30 : x
  2. Step 2: Convert to fraction form
    67,281.30/100,808.55 = 53,187.30/x
  3. Step 3: Cross multiply
    67,281.30x = 100,808.55 × 53,187.30
  4. Step 4: Simplify right side
    67,281.30x = 5,361,734,591.42
  5. Step 5: Solve for x
    x = 5,361,734,591.42/67,281.30
  6. Step 6: Final answer
    x = 79,691.30

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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.