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Finding the Fourth Proportional to 154.85, 232.30 and 45.16

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Solution

The fourth proportional to 154.85, 232.30 and 45.16 is: 67.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.85 : 232.30 = 45.16 : x
  2. Step 2: Convert to fraction form
    154.85/232.30 = 45.16/x
  3. Step 3: Cross multiply
    154.85x = 232.30 × 45.16
  4. Step 4: Simplify right side
    154.85x = 10,490.78
  5. Step 5: Solve for x
    x = 10,490.78/154.85
  6. Step 6: Final answer
    x = 67.75

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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.