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Finding the Fourth Proportional to 261,166.68, 391,711.14 and 83,655.18

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Solution

The fourth proportional to 261,166.68, 391,711.14 and 83,655.18 is: 125,470.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,166.68 : 391,711.14 = 83,655.18 : x
  2. Step 2: Convert to fraction form
    261,166.68/391,711.14 = 83,655.18/x
  3. Step 3: Cross multiply
    261,166.68x = 391,711.14 × 83,655.18
  4. Step 4: Simplify right side
    261,166.68x = 32,768,665,924.71
  5. Step 5: Solve for x
    x = 32,768,665,924.71/261,166.68
  6. Step 6: Final answer
    x = 125,470.32

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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.