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Finding the Fourth Proportional to 121.01, 181.51 and 75.37

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Solution

The fourth proportional to 121.01, 181.51 and 75.37 is: 113.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.01 : 181.51 = 75.37 : x
  2. Step 2: Convert to fraction form
    121.01/181.51 = 75.37/x
  3. Step 3: Cross multiply
    121.01x = 181.51 × 75.37
  4. Step 4: Simplify right side
    121.01x = 13,680.41
  5. Step 5: Solve for x
    x = 13,680.41/121.01
  6. Step 6: Final answer
    x = 113.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.