Home / 82,769.20-124,153.80-20,439.70

Finding the Fourth Proportional to 82,769.20, 124,153.80 and 20,439.70

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Solution

The fourth proportional to 82,769.20, 124,153.80 and 20,439.70 is: 30,659.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,769.20 : 124,153.80 = 20,439.70 : x
  2. Step 2: Convert to fraction form
    82,769.20/124,153.80 = 20,439.70/x
  3. Step 3: Cross multiply
    82,769.20x = 124,153.80 × 20,439.70
  4. Step 4: Simplify right side
    82,769.20x = 2,537,666,425.86
  5. Step 5: Solve for x
    x = 2,537,666,425.86/82,769.20
  6. Step 6: Final answer
    x = 30,659.55

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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.