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Finding the Fourth Proportional to 118,061.20, 177,091.80 and 64,917.10

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Solution

The fourth proportional to 118,061.20, 177,091.80 and 64,917.10 is: 97,375.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,061.20 : 177,091.80 = 64,917.10 : x
  2. Step 2: Convert to fraction form
    118,061.20/177,091.80 = 64,917.10/x
  3. Step 3: Cross multiply
    118,061.20x = 177,091.80 × 64,917.10
  4. Step 4: Simplify right side
    118,061.20x = 11,496,286,089.78
  5. Step 5: Solve for x
    x = 11,496,286,089.78/118,061.20
  6. Step 6: Final answer
    x = 97,375.65

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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.