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Finding the Fourth Proportional to 146.86, 220.30 and 55.54

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Solution

The fourth proportional to 146.86, 220.30 and 55.54 is: 83.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.86 : 220.30 = 55.54 : x
  2. Step 2: Convert to fraction form
    146.86/220.30 = 55.54/x
  3. Step 3: Cross multiply
    146.86x = 220.30 × 55.54
  4. Step 4: Simplify right side
    146.86x = 12,234.77
  5. Step 5: Solve for x
    x = 12,234.77/146.86
  6. Step 6: Final answer
    x = 83.31

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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.