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Finding the Fourth Proportional to 86,691, 129,999.57 and 34,063.56

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Solution

The fourth proportional to 86,691, 129,999.57 and 34,063.56 is: 51,080.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,691 : 129,999.57 = 34,063.56 : x
  2. Step 2: Convert to fraction form
    86,691/129,999.57 = 34,063.56/x
  3. Step 3: Cross multiply
    86,691x = 129,999.57 × 34,063.56
  4. Step 4: Simplify right side
    86,691x = 4,428,248,152.67
  5. Step 5: Solve for x
    x = 4,428,248,152.67/86,691
  6. Step 6: Final answer
    x = 51,080.83

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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.