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Finding the Fourth Proportional to 154.13, 212.63 and 136.71

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Solution

The fourth proportional to 154.13, 212.63 and 136.71 is: 188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.13 : 212.63 = 136.71 : x
  2. Step 2: Convert to fraction form
    154.13/212.63 = 136.71/x
  3. Step 3: Cross multiply
    154.13x = 212.63 × 136.71
  4. Step 4: Simplify right side
    154.13x = 29,067.96
  5. Step 5: Solve for x
    x = 29,067.96/154.13
  6. Step 6: Final answer
    x = 188.60

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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.