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Finding the Fourth Proportional to 127,691.22, 191,706.12 and 109,090.78

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Solution

The fourth proportional to 127,691.22, 191,706.12 and 109,090.78 is: 163,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,691.22 : 191,706.12 = 109,090.78 : x
  2. Step 2: Convert to fraction form
    127,691.22/191,706.12 = 109,090.78/x
  3. Step 3: Cross multiply
    127,691.22x = 191,706.12 × 109,090.78
  4. Step 4: Simplify right side
    127,691.22x = 20,913,370,161.57
  5. Step 5: Solve for x
    x = 20,913,370,161.57/127,691.22
  6. Step 6: Final answer
    x = 163,780.80

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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.