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Finding the Fourth Proportional to 84.88, 117.08 and 52.15

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Solution

The fourth proportional to 84.88, 117.08 and 52.15 is: 71.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.88 : 117.08 = 52.15 : x
  2. Step 2: Convert to fraction form
    84.88/117.08 = 52.15/x
  3. Step 3: Cross multiply
    84.88x = 117.08 × 52.15
  4. Step 4: Simplify right side
    84.88x = 6,105.17
  5. Step 5: Solve for x
    x = 6,105.17/84.88
  6. Step 6: Final answer
    x = 71.93

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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.