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Finding the Fourth Proportional to 134.70, 185.85 and 90.96

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Solution

The fourth proportional to 134.70, 185.85 and 90.96 is: 125.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.70 : 185.85 = 90.96 : x
  2. Step 2: Convert to fraction form
    134.70/185.85 = 90.96/x
  3. Step 3: Cross multiply
    134.70x = 185.85 × 90.96
  4. Step 4: Simplify right side
    134.70x = 16,904.92
  5. Step 5: Solve for x
    x = 16,904.92/134.70
  6. Step 6: Final answer
    x = 125.50

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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.