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Finding the Fourth Proportional to 121.01, 180.51 and 118.28

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Solution

The fourth proportional to 121.01, 180.51 and 118.28 is: 176.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.01 : 180.51 = 118.28 : x
  2. Step 2: Convert to fraction form
    121.01/180.51 = 118.28/x
  3. Step 3: Cross multiply
    121.01x = 180.51 × 118.28
  4. Step 4: Simplify right side
    121.01x = 21,349.82
  5. Step 5: Solve for x
    x = 21,349.82/121.01
  6. Step 6: Final answer
    x = 176.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.