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Finding the Fourth Proportional to 111,508.58, 153,811.84 and 66,154.45

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Solution

The fourth proportional to 111,508.58, 153,811.84 and 66,154.45 is: 91,251.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,508.58 : 153,811.84 = 66,154.45 : x
  2. Step 2: Convert to fraction form
    111,508.58/153,811.84 = 66,154.45/x
  3. Step 3: Cross multiply
    111,508.58x = 153,811.84 × 66,154.45
  4. Step 4: Simplify right side
    111,508.58x = 10,175,337,128.77
  5. Step 5: Solve for x
    x = 10,175,337,128.77/111,508.58
  6. Step 6: Final answer
    x = 91,251.61

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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.