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Finding the Fourth Proportional to 82,541.70, 123,812.55 and 20,212.20

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Solution

The fourth proportional to 82,541.70, 123,812.55 and 20,212.20 is: 30,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,541.70 : 123,812.55 = 20,212.20 : x
  2. Step 2: Convert to fraction form
    82,541.70/123,812.55 = 20,212.20/x
  3. Step 3: Cross multiply
    82,541.70x = 123,812.55 × 20,212.20
  4. Step 4: Simplify right side
    82,541.70x = 2,502,524,023.11
  5. Step 5: Solve for x
    x = 2,502,524,023.11/82,541.70
  6. Step 6: Final answer
    x = 30,318.30

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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.