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Finding the Fourth Proportional to 91,127.40, 136,691.10 and 83,910.30

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Solution

The fourth proportional to 91,127.40, 136,691.10 and 83,910.30 is: 125,865.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,127.40 : 136,691.10 = 83,910.30 : x
  2. Step 2: Convert to fraction form
    91,127.40/136,691.10 = 83,910.30/x
  3. Step 3: Cross multiply
    91,127.40x = 136,691.10 × 83,910.30
  4. Step 4: Simplify right side
    91,127.40x = 11,469,791,208.33
  5. Step 5: Solve for x
    x = 11,469,791,208.33/91,127.40
  6. Step 6: Final answer
    x = 125,865.45

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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.