Home / 82,760.20-124,140.30-81,885.40

Finding the Fourth Proportional to 82,760.20, 124,140.30 and 81,885.40

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Solution

The fourth proportional to 82,760.20, 124,140.30 and 81,885.40 is: 122,828.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,760.20 : 124,140.30 = 81,885.40 : x
  2. Step 2: Convert to fraction form
    82,760.20/124,140.30 = 81,885.40/x
  3. Step 3: Cross multiply
    82,760.20x = 124,140.30 × 81,885.40
  4. Step 4: Simplify right side
    82,760.20x = 10,165,278,121.62
  5. Step 5: Solve for x
    x = 10,165,278,121.62/82,760.20
  6. Step 6: Final answer
    x = 122,828.10

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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.