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Finding the Fourth Proportional to 83,087.79, 124,489.89 and 45,679.20

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Solution

The fourth proportional to 83,087.79, 124,489.89 and 45,679.20 is: 68,440.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,087.79 : 124,489.89 = 45,679.20 : x
  2. Step 2: Convert to fraction form
    83,087.79/124,489.89 = 45,679.20/x
  3. Step 3: Cross multiply
    83,087.79x = 124,489.89 × 45,679.20
  4. Step 4: Simplify right side
    83,087.79x = 5,686,598,583.29
  5. Step 5: Solve for x
    x = 5,686,598,583.29/83,087.79
  6. Step 6: Final answer
    x = 68,440.85

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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.