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Finding the Fourth Proportional to 154.96, 232.43 and 90.79

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Solution

The fourth proportional to 154.96, 232.43 and 90.79 is: 136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.96 : 232.43 = 90.79 : x
  2. Step 2: Convert to fraction form
    154.96/232.43 = 90.79/x
  3. Step 3: Cross multiply
    154.96x = 232.43 × 90.79
  4. Step 4: Simplify right side
    154.96x = 21,101.16
  5. Step 5: Solve for x
    x = 21,101.16/154.96
  6. Step 6: Final answer
    x = 136.18

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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.