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Finding the Fourth Proportional to 164.86, 227.68 and 115.65

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Solution

The fourth proportional to 164.86, 227.68 and 115.65 is: 159.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.86 : 227.68 = 115.65 : x
  2. Step 2: Convert to fraction form
    164.86/227.68 = 115.65/x
  3. Step 3: Cross multiply
    164.86x = 227.68 × 115.65
  4. Step 4: Simplify right side
    164.86x = 26,330.90
  5. Step 5: Solve for x
    x = 26,330.90/164.86
  6. Step 6: Final answer
    x = 159.72

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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.