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Finding the Fourth Proportional to 124,672.40, 172,049.28 and 68,085.44

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Solution

The fourth proportional to 124,672.40, 172,049.28 and 68,085.44 is: 93,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,672.40 : 172,049.28 = 68,085.44 : x
  2. Step 2: Convert to fraction form
    124,672.40/172,049.28 = 68,085.44/x
  3. Step 3: Cross multiply
    124,672.40x = 172,049.28 × 68,085.44
  4. Step 4: Simplify right side
    124,672.40x = 11,714,050,930.48
  5. Step 5: Solve for x
    x = 11,714,050,930.48/124,672.40
  6. Step 6: Final answer
    x = 93,958.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.