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Finding the Fourth Proportional to 81,492.73, 122,049.55 and 79,250.47

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Solution

The fourth proportional to 81,492.73, 122,049.55 and 79,250.47 is: 118,691.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,492.73 : 122,049.55 = 79,250.47 : x
  2. Step 2: Convert to fraction form
    81,492.73/122,049.55 = 79,250.47/x
  3. Step 3: Cross multiply
    81,492.73x = 122,049.55 × 79,250.47
  4. Step 4: Simplify right side
    81,492.73x = 9,672,484,200.79
  5. Step 5: Solve for x
    x = 9,672,484,200.79/81,492.73
  6. Step 6: Final answer
    x = 118,691.38

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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.