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Finding the Fourth Proportional to 83,674.70, 125,512.05 and 21,345.20

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Solution

The fourth proportional to 83,674.70, 125,512.05 and 21,345.20 is: 32,017.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,674.70 : 125,512.05 = 21,345.20 : x
  2. Step 2: Convert to fraction form
    83,674.70/125,512.05 = 21,345.20/x
  3. Step 3: Cross multiply
    83,674.70x = 125,512.05 × 21,345.20
  4. Step 4: Simplify right side
    83,674.70x = 2,679,079,182.10
  5. Step 5: Solve for x
    x = 2,679,079,182.10/83,674.70
  6. Step 6: Final answer
    x = 32,017.79

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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.