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Finding the Fourth Proportional to 72,452.39, 108,679.35 and 19,861.88

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Solution

The fourth proportional to 72,452.39, 108,679.35 and 19,861.88 is: 29,793.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,452.39 : 108,679.35 = 19,861.88 : x
  2. Step 2: Convert to fraction form
    72,452.39/108,679.35 = 19,861.88/x
  3. Step 3: Cross multiply
    72,452.39x = 108,679.35 × 19,861.88
  4. Step 4: Simplify right side
    72,452.39x = 2,158,576,208.18
  5. Step 5: Solve for x
    x = 2,158,576,208.18/72,452.39
  6. Step 6: Final answer
    x = 29,793.03

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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.