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Finding the Fourth Proportional to 83,915.68, 115,839.92 and 60,000.80

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Solution

The fourth proportional to 83,915.68, 115,839.92 and 60,000.80 is: 82,827.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,915.68 : 115,839.92 = 60,000.80 : x
  2. Step 2: Convert to fraction form
    83,915.68/115,839.92 = 60,000.80/x
  3. Step 3: Cross multiply
    83,915.68x = 115,839.92 × 60,000.80
  4. Step 4: Simplify right side
    83,915.68x = 6,950,487,871.94
  5. Step 5: Solve for x
    x = 6,950,487,871.94/83,915.68
  6. Step 6: Final answer
    x = 82,827.05

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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.