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Finding the Fourth Proportional to 154.11, 230.59 and 138.95

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Solution

The fourth proportional to 154.11, 230.59 and 138.95 is: 207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.11 : 230.59 = 138.95 : x
  2. Step 2: Convert to fraction form
    154.11/230.59 = 138.95/x
  3. Step 3: Cross multiply
    154.11x = 230.59 × 138.95
  4. Step 4: Simplify right side
    154.11x = 32,038.63
  5. Step 5: Solve for x
    x = 32,038.63/154.11
  6. Step 6: Final answer
    x = 207.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.