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Finding the Fourth Proportional to 153.72, 230.23 and 92.72

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Solution

The fourth proportional to 153.72, 230.23 and 92.72 is: 138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.72 : 230.23 = 92.72 : x
  2. Step 2: Convert to fraction form
    153.72/230.23 = 92.72/x
  3. Step 3: Cross multiply
    153.72x = 230.23 × 92.72
  4. Step 4: Simplify right side
    153.72x = 21,346.46
  5. Step 5: Solve for x
    x = 21,346.46/153.72
  6. Step 6: Final answer
    x = 138.87

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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.