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Finding the Fourth Proportional to 148.74, 223.01 and 51.20

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Solution

The fourth proportional to 148.74, 223.01 and 51.20 is: 76.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.74 : 223.01 = 51.20 : x
  2. Step 2: Convert to fraction form
    148.74/223.01 = 51.20/x
  3. Step 3: Cross multiply
    148.74x = 223.01 × 51.20
  4. Step 4: Simplify right side
    148.74x = 11,416.74
  5. Step 5: Solve for x
    x = 11,416.74/148.74
  6. Step 6: Final answer
    x = 76.76

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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.