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Finding the Fourth Proportional to 127,345.80, 191,105.10 and 82,864.20

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Solution

The fourth proportional to 127,345.80, 191,105.10 and 82,864.20 is: 124,352.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,345.80 : 191,105.10 = 82,864.20 : x
  2. Step 2: Convert to fraction form
    127,345.80/191,105.10 = 82,864.20/x
  3. Step 3: Cross multiply
    127,345.80x = 191,105.10 × 82,864.20
  4. Step 4: Simplify right side
    127,345.80x = 15,835,771,227.42
  5. Step 5: Solve for x
    x = 15,835,771,227.42/127,345.80
  6. Step 6: Final answer
    x = 124,352.52

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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.