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Finding the Fourth Proportional to 150.68, 225.48 and 138.80

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Solution

The fourth proportional to 150.68, 225.48 and 138.80 is: 207.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.68 : 225.48 = 138.80 : x
  2. Step 2: Convert to fraction form
    150.68/225.48 = 138.80/x
  3. Step 3: Cross multiply
    150.68x = 225.48 × 138.80
  4. Step 4: Simplify right side
    150.68x = 31,296.62
  5. Step 5: Solve for x
    x = 31,296.62/150.68
  6. Step 6: Final answer
    x = 207.70

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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.