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Finding the Fourth Proportional to 83,275.20, 124,912.80 and 20,945.70

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Solution

The fourth proportional to 83,275.20, 124,912.80 and 20,945.70 is: 31,418.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,275.20 : 124,912.80 = 20,945.70 : x
  2. Step 2: Convert to fraction form
    83,275.20/124,912.80 = 20,945.70/x
  3. Step 3: Cross multiply
    83,275.20x = 124,912.80 × 20,945.70
  4. Step 4: Simplify right side
    83,275.20x = 2,616,386,034.96
  5. Step 5: Solve for x
    x = 2,616,386,034.96/83,275.20
  6. Step 6: Final answer
    x = 31,418.55

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1.5x scale

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.