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Finding the Fourth Proportional to 134.87, 186.08 and 91.26

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Solution

The fourth proportional to 134.87, 186.08 and 91.26 is: 125.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.87 : 186.08 = 91.26 : x
  2. Step 2: Convert to fraction form
    134.87/186.08 = 91.26/x
  3. Step 3: Cross multiply
    134.87x = 186.08 × 91.26
  4. Step 4: Simplify right side
    134.87x = 16,981.20
  5. Step 5: Solve for x
    x = 16,981.20/134.87
  6. Step 6: Final answer
    x = 125.91

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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.