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Finding the Fourth Proportional to 186.95, 258.02 and 109.32

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Solution

The fourth proportional to 186.95, 258.02 and 109.32 is: 150.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.95 : 258.02 = 109.32 : x
  2. Step 2: Convert to fraction form
    186.95/258.02 = 109.32/x
  3. Step 3: Cross multiply
    186.95x = 258.02 × 109.32
  4. Step 4: Simplify right side
    186.95x = 28,206.20
  5. Step 5: Solve for x
    x = 28,206.20/186.95
  6. Step 6: Final answer
    x = 150.88

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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.