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Finding the Fourth Proportional to 157,697.87, 217,619.64 and 86,079.11

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Solution

The fourth proportional to 157,697.87, 217,619.64 and 86,079.11 is: 118,787.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,697.87 : 217,619.64 = 86,079.11 : x
  2. Step 2: Convert to fraction form
    157,697.87/217,619.64 = 86,079.11/x
  3. Step 3: Cross multiply
    157,697.87x = 217,619.64 × 86,079.11
  4. Step 4: Simplify right side
    157,697.87x = 18,732,503,841.62
  5. Step 5: Solve for x
    x = 18,732,503,841.62/157,697.87
  6. Step 6: Final answer
    x = 118,787.30

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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.