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Finding the Fourth Proportional to 82,721.80, 124,082.70 and 23,559.40

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Solution

The fourth proportional to 82,721.80, 124,082.70 and 23,559.40 is: 35,339.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,721.80 : 124,082.70 = 23,559.40 : x
  2. Step 2: Convert to fraction form
    82,721.80/124,082.70 = 23,559.40/x
  3. Step 3: Cross multiply
    82,721.80x = 124,082.70 × 23,559.40
  4. Step 4: Simplify right side
    82,721.80x = 2,923,313,962.38
  5. Step 5: Solve for x
    x = 2,923,313,962.38/82,721.80
  6. Step 6: Final answer
    x = 35,339.10

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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.