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Finding the Fourth Proportional to 85,988.61, 128,096.10 and 83,377.17

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Solution

The fourth proportional to 85,988.61, 128,096.10 and 83,377.17 is: 124,205.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,988.61 : 128,096.10 = 83,377.17 : x
  2. Step 2: Convert to fraction form
    85,988.61/128,096.10 = 83,377.17/x
  3. Step 3: Cross multiply
    85,988.61x = 128,096.10 × 83,377.17
  4. Step 4: Simplify right side
    85,988.61x = 10,680,290,306.04
  5. Step 5: Solve for x
    x = 10,680,290,306.04/85,988.61
  6. Step 6: Final answer
    x = 124,205.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.