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Finding the Fourth Proportional to 136,598.91, 188,439.62 and 91,288.11

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Solution

The fourth proportional to 136,598.91, 188,439.62 and 91,288.11 is: 125,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,598.91 : 188,439.62 = 91,288.11 : x
  2. Step 2: Convert to fraction form
    136,598.91/188,439.62 = 91,288.11/x
  3. Step 3: Cross multiply
    136,598.91x = 188,439.62 × 91,288.11
  4. Step 4: Simplify right side
    136,598.91x = 17,202,296,044.94
  5. Step 5: Solve for x
    x = 17,202,296,044.94/136,598.91
  6. Step 6: Final answer
    x = 125,932.90

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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.