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Finding the Fourth Proportional to 136,859.52, 188,763.84 and 92,138.88

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Solution

The fourth proportional to 136,859.52, 188,763.84 and 92,138.88 is: 127,082.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,859.52 : 188,763.84 = 92,138.88 : x
  2. Step 2: Convert to fraction form
    136,859.52/188,763.84 = 92,138.88/x
  3. Step 3: Cross multiply
    136,859.52x = 188,763.84 × 92,138.88
  4. Step 4: Simplify right side
    136,859.52x = 17,392,488,802.10
  5. Step 5: Solve for x
    x = 17,392,488,802.10/136,859.52
  6. Step 6: Final answer
    x = 127,082.78

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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.