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Finding the Fourth Proportional to 149.95, 206.71 and 103.25

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Solution

The fourth proportional to 149.95, 206.71 and 103.25 is: 142.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.95 : 206.71 = 103.25 : x
  2. Step 2: Convert to fraction form
    149.95/206.71 = 103.25/x
  3. Step 3: Cross multiply
    149.95x = 206.71 × 103.25
  4. Step 4: Simplify right side
    149.95x = 21,341.52
  5. Step 5: Solve for x
    x = 21,341.52/149.95
  6. Step 6: Final answer
    x = 142.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.