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Finding the Fourth Proportional to 174.45, 261.53 and 87.68

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Solution

The fourth proportional to 174.45, 261.53 and 87.68 is: 131.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.45 : 261.53 = 87.68 : x
  2. Step 2: Convert to fraction form
    174.45/261.53 = 87.68/x
  3. Step 3: Cross multiply
    174.45x = 261.53 × 87.68
  4. Step 4: Simplify right side
    174.45x = 22,929.20
  5. Step 5: Solve for x
    x = 22,929.20/174.45
  6. Step 6: Final answer
    x = 131.44

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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.