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Finding the Fourth Proportional to 186.50, 279.48 and 117.81

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Solution

The fourth proportional to 186.50, 279.48 and 117.81 is: 176.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.50 : 279.48 = 117.81 : x
  2. Step 2: Convert to fraction form
    186.50/279.48 = 117.81/x
  3. Step 3: Cross multiply
    186.50x = 279.48 × 117.81
  4. Step 4: Simplify right side
    186.50x = 32,925.98
  5. Step 5: Solve for x
    x = 32,925.98/186.50
  6. Step 6: Final answer
    x = 176.54

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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.