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Finding the Fourth Proportional to 174.40, 240.63 and 121.86

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Solution

The fourth proportional to 174.40, 240.63 and 121.86 is: 168.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.40 : 240.63 = 121.86 : x
  2. Step 2: Convert to fraction form
    174.40/240.63 = 121.86/x
  3. Step 3: Cross multiply
    174.40x = 240.63 × 121.86
  4. Step 4: Simplify right side
    174.40x = 29,323.17
  5. Step 5: Solve for x
    x = 29,323.17/174.40
  6. Step 6: Final answer
    x = 168.14

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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.