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Finding the Fourth Proportional to 72,350.30, 108,532.96 and 19,759.78

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Solution

The fourth proportional to 72,350.30, 108,532.96 and 19,759.78 is: 29,641.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,350.30 : 108,532.96 = 19,759.78 : x
  2. Step 2: Convert to fraction form
    72,350.30/108,532.96 = 19,759.78/x
  3. Step 3: Cross multiply
    72,350.30x = 108,532.96 × 19,759.78
  4. Step 4: Simplify right side
    72,350.30x = 2,144,587,609.76
  5. Step 5: Solve for x
    x = 2,144,587,609.76/72,350.30
  6. Step 6: Final answer
    x = 29,641.73

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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.