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Finding the Fourth Proportional to 261,398.79, 392,061.12 and 83,882.85

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Solution

The fourth proportional to 261,398.79, 392,061.12 and 83,882.85 is: 125,812.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,398.79 : 392,061.12 = 83,882.85 : x
  2. Step 2: Convert to fraction form
    261,398.79/392,061.12 = 83,882.85/x
  3. Step 3: Cross multiply
    261,398.79x = 392,061.12 × 83,882.85
  4. Step 4: Simplify right side
    261,398.79x = 32,887,204,119.79
  5. Step 5: Solve for x
    x = 32,887,204,119.79/261,398.79
  6. Step 6: Final answer
    x = 125,812.38

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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.