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Finding the Fourth Proportional to 136.47, 188.16 and 116.79

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Solution

The fourth proportional to 136.47, 188.16 and 116.79 is: 161.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.47 : 188.16 = 116.79 : x
  2. Step 2: Convert to fraction form
    136.47/188.16 = 116.79/x
  3. Step 3: Cross multiply
    136.47x = 188.16 × 116.79
  4. Step 4: Simplify right side
    136.47x = 21,975.21
  5. Step 5: Solve for x
    x = 21,975.21/136.47
  6. Step 6: Final answer
    x = 161.03

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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.