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Finding the Fourth Proportional to 165.27, 247.94 and 139.83

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Solution

The fourth proportional to 165.27, 247.94 and 139.83 is: 209.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.27 : 247.94 = 139.83 : x
  2. Step 2: Convert to fraction form
    165.27/247.94 = 139.83/x
  3. Step 3: Cross multiply
    165.27x = 247.94 × 139.83
  4. Step 4: Simplify right side
    165.27x = 34,669.45
  5. Step 5: Solve for x
    x = 34,669.45/165.27
  6. Step 6: Final answer
    x = 209.77

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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.