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Finding the Fourth Proportional to 146.91, 220.36 and 50.72

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Solution

The fourth proportional to 146.91, 220.36 and 50.72 is: 76.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.91 : 220.36 = 50.72 : x
  2. Step 2: Convert to fraction form
    146.91/220.36 = 50.72/x
  3. Step 3: Cross multiply
    146.91x = 220.36 × 50.72
  4. Step 4: Simplify right side
    146.91x = 11,177.08
  5. Step 5: Solve for x
    x = 11,177.08/146.91
  6. Step 6: Final answer
    x = 76.08

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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.