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Finding the Fourth Proportional to 128,452.53, 192,697.19 and 39,712.91

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Solution

The fourth proportional to 128,452.53, 192,697.19 and 39,712.91 is: 59,575.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,452.53 : 192,697.19 = 39,712.91 : x
  2. Step 2: Convert to fraction form
    128,452.53/192,697.19 = 39,712.91/x
  3. Step 3: Cross multiply
    128,452.53x = 192,697.19 × 39,712.91
  4. Step 4: Simplify right side
    128,452.53x = 7,652,565,001.67
  5. Step 5: Solve for x
    x = 7,652,565,001.67/128,452.53
  6. Step 6: Final answer
    x = 59,575.04

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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.