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Finding the Fourth Proportional to 149.40, 223.91 and 72.22

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Solution

The fourth proportional to 149.40, 223.91 and 72.22 is: 108.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.40 : 223.91 = 72.22 : x
  2. Step 2: Convert to fraction form
    149.40/223.91 = 72.22/x
  3. Step 3: Cross multiply
    149.40x = 223.91 × 72.22
  4. Step 4: Simplify right side
    149.40x = 16,170.40
  5. Step 5: Solve for x
    x = 16,170.40/149.40
  6. Step 6: Final answer
    x = 108.23

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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.