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Finding the Fourth Proportional to 121.04, 167.06 and 79.66

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Solution

The fourth proportional to 121.04, 167.06 and 79.66 is: 109.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.04 : 167.06 = 79.66 : x
  2. Step 2: Convert to fraction form
    121.04/167.06 = 79.66/x
  3. Step 3: Cross multiply
    121.04x = 167.06 × 79.66
  4. Step 4: Simplify right side
    121.04x = 13,308.00
  5. Step 5: Solve for x
    x = 13,308.00/121.04
  6. Step 6: Final answer
    x = 109.95

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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.