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Finding the Fourth Proportional to 84.95, 117.17 and 67.43

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Solution

The fourth proportional to 84.95, 117.17 and 67.43 is: 93.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.95 : 117.17 = 67.43 : x
  2. Step 2: Convert to fraction form
    84.95/117.17 = 67.43/x
  3. Step 3: Cross multiply
    84.95x = 117.17 × 67.43
  4. Step 4: Simplify right side
    84.95x = 7,901.36
  5. Step 5: Solve for x
    x = 7,901.36/84.95
  6. Step 6: Final answer
    x = 93.01

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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.