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Finding the Fourth Proportional to 153.92, 230.76 and 105.68

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Solution

The fourth proportional to 153.92, 230.76 and 105.68 is: 158.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.92 : 230.76 = 105.68 : x
  2. Step 2: Convert to fraction form
    153.92/230.76 = 105.68/x
  3. Step 3: Cross multiply
    153.92x = 230.76 × 105.68
  4. Step 4: Simplify right side
    153.92x = 24,386.72
  5. Step 5: Solve for x
    x = 24,386.72/153.92
  6. Step 6: Final answer
    x = 158.44

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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.