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Finding the Fourth Proportional to 147.95, 220.91 and 117.17

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Solution

The fourth proportional to 147.95, 220.91 and 117.17 is: 174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.95 : 220.91 = 117.17 : x
  2. Step 2: Convert to fraction form
    147.95/220.91 = 117.17/x
  3. Step 3: Cross multiply
    147.95x = 220.91 × 117.17
  4. Step 4: Simplify right side
    147.95x = 25,882.92
  5. Step 5: Solve for x
    x = 25,882.92/147.95
  6. Step 6: Final answer
    x = 174.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.