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Finding the Fourth Proportional to 111,912.03, 154,332.14 and 86,377.59

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Solution

The fourth proportional to 111,912.03, 154,332.14 and 86,377.59 is: 119,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,912.03 : 154,332.14 = 86,377.59 : x
  2. Step 2: Convert to fraction form
    111,912.03/154,332.14 = 86,377.59/x
  3. Step 3: Cross multiply
    111,912.03x = 154,332.14 × 86,377.59
  4. Step 4: Simplify right side
    111,912.03x = 13,330,837,880.85
  5. Step 5: Solve for x
    x = 13,330,837,880.85/111,912.03
  6. Step 6: Final answer
    x = 119,118.90

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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.