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Finding the Fourth Proportional to 134.89, 186.37 and 85.88

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Solution

The fourth proportional to 134.89, 186.37 and 85.88 is: 118.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.89 : 186.37 = 85.88 : x
  2. Step 2: Convert to fraction form
    134.89/186.37 = 85.88/x
  3. Step 3: Cross multiply
    134.89x = 186.37 × 85.88
  4. Step 4: Simplify right side
    134.89x = 16,005.71
  5. Step 5: Solve for x
    x = 16,005.71/134.89
  6. Step 6: Final answer
    x = 118.66

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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.