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Finding the Fourth Proportional to 150.60, 225.60 and 139.80

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Solution

The fourth proportional to 150.60, 225.60 and 139.80 is: 209.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.60 : 225.60 = 139.80 : x
  2. Step 2: Convert to fraction form
    150.60/225.60 = 139.80/x
  3. Step 3: Cross multiply
    150.60x = 225.60 × 139.80
  4. Step 4: Simplify right side
    150.60x = 31,538.88
  5. Step 5: Solve for x
    x = 31,538.88/150.60
  6. Step 6: Final answer
    x = 209.42

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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.