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Finding the Fourth Proportional to 71,731.68, 99,060.70 and 59,109.92

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Solution

The fourth proportional to 71,731.68, 99,060.70 and 59,109.92 is: 81,630.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,731.68 : 99,060.70 = 59,109.92 : x
  2. Step 2: Convert to fraction form
    71,731.68/99,060.70 = 59,109.92/x
  3. Step 3: Cross multiply
    71,731.68x = 99,060.70 × 59,109.92
  4. Step 4: Simplify right side
    71,731.68x = 5,855,470,052.14
  5. Step 5: Solve for x
    x = 5,855,470,052.14/71,731.68
  6. Step 6: Final answer
    x = 81,630.18

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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.