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Finding the Fourth Proportional to 176.82, 244.18 and 121.64

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Solution

The fourth proportional to 176.82, 244.18 and 121.64 is: 167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.82 : 244.18 = 121.64 : x
  2. Step 2: Convert to fraction form
    176.82/244.18 = 121.64/x
  3. Step 3: Cross multiply
    176.82x = 244.18 × 121.64
  4. Step 4: Simplify right side
    176.82x = 29,702.06
  5. Step 5: Solve for x
    x = 29,702.06/176.82
  6. Step 6: Final answer
    x = 167.98

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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.