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Finding the Fourth Proportional to 134.48, 185.62 and 87.86

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Solution

The fourth proportional to 134.48, 185.62 and 87.86 is: 121.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.48 : 185.62 = 87.86 : x
  2. Step 2: Convert to fraction form
    134.48/185.62 = 87.86/x
  3. Step 3: Cross multiply
    134.48x = 185.62 × 87.86
  4. Step 4: Simplify right side
    134.48x = 16,308.57
  5. Step 5: Solve for x
    x = 16,308.57/134.48
  6. Step 6: Final answer
    x = 121.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.