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Finding the Fourth Proportional to 121.25, 181.73 and 72.52

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Solution

The fourth proportional to 121.25, 181.73 and 72.52 is: 108.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.25 : 181.73 = 72.52 : x
  2. Step 2: Convert to fraction form
    121.25/181.73 = 72.52/x
  3. Step 3: Cross multiply
    121.25x = 181.73 × 72.52
  4. Step 4: Simplify right side
    121.25x = 13,178.79
  5. Step 5: Solve for x
    x = 13,178.79/121.25
  6. Step 6: Final answer
    x = 108.69

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