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Finding the Fourth Proportional to 149.95, 224.76 and 128.23

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Solution

The fourth proportional to 149.95, 224.76 and 128.23 is: 192.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.95 : 224.76 = 128.23 : x
  2. Step 2: Convert to fraction form
    149.95/224.76 = 128.23/x
  3. Step 3: Cross multiply
    149.95x = 224.76 × 128.23
  4. Step 4: Simplify right side
    149.95x = 28,820.97
  5. Step 5: Solve for x
    x = 28,820.97/149.95
  6. Step 6: Final answer
    x = 192.20

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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.