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Finding the Fourth Proportional to 83,478.68, 115,217.94 and 76,753.65

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Solution

The fourth proportional to 83,478.68, 115,217.94 and 76,753.65 is: 105,936.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,478.68 : 115,217.94 = 76,753.65 : x
  2. Step 2: Convert to fraction form
    83,478.68/115,217.94 = 76,753.65/x
  3. Step 3: Cross multiply
    83,478.68x = 115,217.94 × 76,753.65
  4. Step 4: Simplify right side
    83,478.68x = 8,843,397,440.48
  5. Step 5: Solve for x
    x = 8,843,397,440.48/83,478.68
  6. Step 6: Final answer
    x = 105,936.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.