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Finding the Fourth Proportional to 144.68, 217.88 and 120.53

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Solution

The fourth proportional to 144.68, 217.88 and 120.53 is: 181.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.68 : 217.88 = 120.53 : x
  2. Step 2: Convert to fraction form
    144.68/217.88 = 120.53/x
  3. Step 3: Cross multiply
    144.68x = 217.88 × 120.53
  4. Step 4: Simplify right side
    144.68x = 26,261.02
  5. Step 5: Solve for x
    x = 26,261.02/144.68
  6. Step 6: Final answer
    x = 181.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.