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Finding the Fourth Proportional to 83,649.65, 125,363.72 and 61,358.66

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Solution

The fourth proportional to 83,649.65, 125,363.72 and 61,358.66 is: 91,956.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,649.65 : 125,363.72 = 61,358.66 : x
  2. Step 2: Convert to fraction form
    83,649.65/125,363.72 = 61,358.66/x
  3. Step 3: Cross multiply
    83,649.65x = 125,363.72 × 61,358.66
  4. Step 4: Simplify right side
    83,649.65x = 7,692,148,938.20
  5. Step 5: Solve for x
    x = 7,692,148,938.20/83,649.65
  6. Step 6: Final answer
    x = 91,956.74

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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.