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Finding the Fourth Proportional to 186.56, 280.09 and 117.88

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Solution

The fourth proportional to 186.56, 280.09 and 117.88 is: 176.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.56 : 280.09 = 117.88 : x
  2. Step 2: Convert to fraction form
    186.56/280.09 = 117.88/x
  3. Step 3: Cross multiply
    186.56x = 280.09 × 117.88
  4. Step 4: Simplify right side
    186.56x = 33,017.01
  5. Step 5: Solve for x
    x = 33,017.01/186.56
  6. Step 6: Final answer
    x = 176.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.