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Finding the Fourth Proportional to 84.49, 127.18 and 65.33

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Solution

The fourth proportional to 84.49, 127.18 and 65.33 is: 98.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.49 : 127.18 = 65.33 : x
  2. Step 2: Convert to fraction form
    84.49/127.18 = 65.33/x
  3. Step 3: Cross multiply
    84.49x = 127.18 × 65.33
  4. Step 4: Simplify right side
    84.49x = 8,308.67
  5. Step 5: Solve for x
    x = 8,308.67/84.49
  6. Step 6: Final answer
    x = 98.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.