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Finding the Fourth Proportional to 134.84, 186.53 and 129.78

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Solution

The fourth proportional to 134.84, 186.53 and 129.78 is: 179.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.84 : 186.53 = 129.78 : x
  2. Step 2: Convert to fraction form
    134.84/186.53 = 129.78/x
  3. Step 3: Cross multiply
    134.84x = 186.53 × 129.78
  4. Step 4: Simplify right side
    134.84x = 24,207.86
  5. Step 5: Solve for x
    x = 24,207.86/134.84
  6. Step 6: Final answer
    x = 179.53

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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.