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Finding the Fourth Proportional to 83,615.10, 125,422.65 and 74,429.70

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Solution

The fourth proportional to 83,615.10, 125,422.65 and 74,429.70 is: 111,644.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,615.10 : 125,422.65 = 74,429.70 : x
  2. Step 2: Convert to fraction form
    83,615.10/125,422.65 = 74,429.70/x
  3. Step 3: Cross multiply
    83,615.10x = 125,422.65 × 74,429.70
  4. Step 4: Simplify right side
    83,615.10x = 9,335,170,212.71
  5. Step 5: Solve for x
    x = 9,335,170,212.71/83,615.10
  6. Step 6: Final answer
    x = 111,644.55

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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.