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Finding the Fourth Proportional to 83,447.88, 124,713.68 and 61,005.80

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Solution

The fourth proportional to 83,447.88, 124,713.68 and 61,005.80 is: 91,173.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,447.88 : 124,713.68 = 61,005.80 : x
  2. Step 2: Convert to fraction form
    83,447.88/124,713.68 = 61,005.80/x
  3. Step 3: Cross multiply
    83,447.88x = 124,713.68 × 61,005.80
  4. Step 4: Simplify right side
    83,447.88x = 7,608,257,819.34
  5. Step 5: Solve for x
    x = 7,608,257,819.34/83,447.88
  6. Step 6: Final answer
    x = 91,173.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.