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Finding the Fourth Proportional to 165.91, 248.87 and 48.79

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Solution

The fourth proportional to 165.91, 248.87 and 48.79 is: 73.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.91 : 248.87 = 48.79 : x
  2. Step 2: Convert to fraction form
    165.91/248.87 = 48.79/x
  3. Step 3: Cross multiply
    165.91x = 248.87 × 48.79
  4. Step 4: Simplify right side
    165.91x = 12,142.37
  5. Step 5: Solve for x
    x = 12,142.37/165.91
  6. Step 6: Final answer
    x = 73.19

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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.