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Finding the Fourth Proportional to 91,249.20, 136,838.88 and 43,851

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Solution

The fourth proportional to 91,249.20, 136,838.88 and 43,851 is: 65,759.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,249.20 : 136,838.88 = 43,851 : x
  2. Step 2: Convert to fraction form
    91,249.20/136,838.88 = 43,851/x
  3. Step 3: Cross multiply
    91,249.20x = 136,838.88 × 43,851
  4. Step 4: Simplify right side
    91,249.20x = 6,000,521,726.88
  5. Step 5: Solve for x
    x = 6,000,521,726.88/91,249.20
  6. Step 6: Final answer
    x = 65,759.72

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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.