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Finding the Fourth Proportional to 83,146.20, 124,719.30 and 74,333.40

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Solution

The fourth proportional to 83,146.20, 124,719.30 and 74,333.40 is: 111,500.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,146.20 : 124,719.30 = 74,333.40 : x
  2. Step 2: Convert to fraction form
    83,146.20/124,719.30 = 74,333.40/x
  3. Step 3: Cross multiply
    83,146.20x = 124,719.30 × 74,333.40
  4. Step 4: Simplify right side
    83,146.20x = 9,270,809,614.62
  5. Step 5: Solve for x
    x = 9,270,809,614.62/83,146.20
  6. Step 6: Final answer
    x = 111,500.10

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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.