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Finding the Fourth Proportional to 229.96, 317.35 and 136.81

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Solution

The fourth proportional to 229.96, 317.35 and 136.81 is: 188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.96 : 317.35 = 136.81 : x
  2. Step 2: Convert to fraction form
    229.96/317.35 = 136.81/x
  3. Step 3: Cross multiply
    229.96x = 317.35 × 136.81
  4. Step 4: Simplify right side
    229.96x = 43,416.65
  5. Step 5: Solve for x
    x = 43,416.65/229.96
  6. Step 6: Final answer
    x = 188.80

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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.