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Finding the Fourth Proportional to 135.17, 186.75 and 107.77

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Solution

The fourth proportional to 135.17, 186.75 and 107.77 is: 148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.17 : 186.75 = 107.77 : x
  2. Step 2: Convert to fraction form
    135.17/186.75 = 107.77/x
  3. Step 3: Cross multiply
    135.17x = 186.75 × 107.77
  4. Step 4: Simplify right side
    135.17x = 20,125.58
  5. Step 5: Solve for x
    x = 20,125.58/135.17
  6. Step 6: Final answer
    x = 148.90

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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.