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Finding the Fourth Proportional to 146.96, 220.54 and 74.80

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Solution

The fourth proportional to 146.96, 220.54 and 74.80 is: 112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.96 : 220.54 = 74.80 : x
  2. Step 2: Convert to fraction form
    146.96/220.54 = 74.80/x
  3. Step 3: Cross multiply
    146.96x = 220.54 × 74.80
  4. Step 4: Simplify right side
    146.96x = 16,496.39
  5. Step 5: Solve for x
    x = 16,496.39/146.96
  6. Step 6: Final answer
    x = 112.25

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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.