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Finding the Fourth Proportional to 154.74, 232.48 and 90.66

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Solution

The fourth proportional to 154.74, 232.48 and 90.66 is: 136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.74 : 232.48 = 90.66 : x
  2. Step 2: Convert to fraction form
    154.74/232.48 = 90.66/x
  3. Step 3: Cross multiply
    154.74x = 232.48 × 90.66
  4. Step 4: Simplify right side
    154.74x = 21,076.64
  5. Step 5: Solve for x
    x = 21,076.64/154.74
  6. Step 6: Final answer
    x = 136.21

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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.