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Finding the Fourth Proportional to 111,524.68, 153,904.62 and 63,780.04

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Solution

The fourth proportional to 111,524.68, 153,904.62 and 63,780.04 is: 88,016.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,524.68 : 153,904.62 = 63,780.04 : x
  2. Step 2: Convert to fraction form
    111,524.68/153,904.62 = 63,780.04/x
  3. Step 3: Cross multiply
    111,524.68x = 153,904.62 × 63,780.04
  4. Step 4: Simplify right side
    111,524.68x = 9,816,042,819.78
  5. Step 5: Solve for x
    x = 9,816,042,819.78/111,524.68
  6. Step 6: Final answer
    x = 88,016.78

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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.