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Finding the Fourth Proportional to 134.46, 185.34 and 90.84

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Solution

The fourth proportional to 134.46, 185.34 and 90.84 is: 125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.46 : 185.34 = 90.84 : x
  2. Step 2: Convert to fraction form
    134.46/185.34 = 90.84/x
  3. Step 3: Cross multiply
    134.46x = 185.34 × 90.84
  4. Step 4: Simplify right side
    134.46x = 16,836.29
  5. Step 5: Solve for x
    x = 16,836.29/134.46
  6. Step 6: Final answer
    x = 125.21

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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.