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Finding the Fourth Proportional to 122.10, 167.43 and 117.60

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Solution

The fourth proportional to 122.10, 167.43 and 117.60 is: 161.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.10 : 167.43 = 117.60 : x
  2. Step 2: Convert to fraction form
    122.10/167.43 = 117.60/x
  3. Step 3: Cross multiply
    122.10x = 167.43 × 117.60
  4. Step 4: Simplify right side
    122.10x = 19,689.77
  5. Step 5: Solve for x
    x = 19,689.77/122.10
  6. Step 6: Final answer
    x = 161.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.