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Finding the Fourth Proportional to 153.95, 230.72 and 105.75

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Solution

The fourth proportional to 153.95, 230.72 and 105.75 is: 158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.95 : 230.72 = 105.75 : x
  2. Step 2: Convert to fraction form
    153.95/230.72 = 105.75/x
  3. Step 3: Cross multiply
    153.95x = 230.72 × 105.75
  4. Step 4: Simplify right side
    153.95x = 24,398.11
  5. Step 5: Solve for x
    x = 24,398.11/153.95
  6. Step 6: Final answer
    x = 158.49

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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.