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Finding the Fourth Proportional to 153.88, 231.59 and 115.56

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Solution

The fourth proportional to 153.88, 231.59 and 115.56 is: 173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.88 : 231.59 = 115.56 : x
  2. Step 2: Convert to fraction form
    153.88/231.59 = 115.56/x
  3. Step 3: Cross multiply
    153.88x = 231.59 × 115.56
  4. Step 4: Simplify right side
    153.88x = 26,762.54
  5. Step 5: Solve for x
    x = 26,762.54/153.88
  6. Step 6: Final answer
    x = 173.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.