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Finding the Fourth Proportional to 121.08, 166.76 and 113.33

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Solution

The fourth proportional to 121.08, 166.76 and 113.33 is: 156.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.08 : 166.76 = 113.33 : x
  2. Step 2: Convert to fraction form
    121.08/166.76 = 113.33/x
  3. Step 3: Cross multiply
    121.08x = 166.76 × 113.33
  4. Step 4: Simplify right side
    121.08x = 18,897.51
  5. Step 5: Solve for x
    x = 18,897.51/121.08
  6. Step 6: Final answer
    x = 156.07

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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.