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Finding the Fourth Proportional to 136,611.10, 204,697.95 and 86,601.70

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Solution

The fourth proportional to 136,611.10, 204,697.95 and 86,601.70 is: 129,763.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,611.10 : 204,697.95 = 86,601.70 : x
  2. Step 2: Convert to fraction form
    136,611.10/204,697.95 = 86,601.70/x
  3. Step 3: Cross multiply
    136,611.10x = 204,697.95 × 86,601.70
  4. Step 4: Simplify right side
    136,611.10x = 17,727,190,456.52
  5. Step 5: Solve for x
    x = 17,727,190,456.52/136,611.10
  6. Step 6: Final answer
    x = 129,763.91

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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.