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Finding the Fourth Proportional to 186.14, 256.85 and 115.23

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Solution

The fourth proportional to 186.14, 256.85 and 115.23 is: 159.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.14 : 256.85 = 115.23 : x
  2. Step 2: Convert to fraction form
    186.14/256.85 = 115.23/x
  3. Step 3: Cross multiply
    186.14x = 256.85 × 115.23
  4. Step 4: Simplify right side
    186.14x = 29,597.11
  5. Step 5: Solve for x
    x = 29,597.11/186.14
  6. Step 6: Final answer
    x = 159.01

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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.