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Finding the Fourth Proportional to 165.86, 248.47 and 100.88

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Solution

The fourth proportional to 165.86, 248.47 and 100.88 is: 151.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.86 : 248.47 = 100.88 : x
  2. Step 2: Convert to fraction form
    165.86/248.47 = 100.88/x
  3. Step 3: Cross multiply
    165.86x = 248.47 × 100.88
  4. Step 4: Simplify right side
    165.86x = 25,065.65
  5. Step 5: Solve for x
    x = 25,065.65/165.86
  6. Step 6: Final answer
    x = 151.13

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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.