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Finding the Fourth Proportional to 147.15, 203.19 and 91.95

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Solution

The fourth proportional to 147.15, 203.19 and 91.95 is: 126.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.15 : 203.19 = 91.95 : x
  2. Step 2: Convert to fraction form
    147.15/203.19 = 91.95/x
  3. Step 3: Cross multiply
    147.15x = 203.19 × 91.95
  4. Step 4: Simplify right side
    147.15x = 18,683.32
  5. Step 5: Solve for x
    x = 18,683.32/147.15
  6. Step 6: Final answer
    x = 126.97

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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.