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Finding the Fourth Proportional to 84.84, 127.34 and 55.87

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Solution

The fourth proportional to 84.84, 127.34 and 55.87 is: 83.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.84 : 127.34 = 55.87 : x
  2. Step 2: Convert to fraction form
    84.84/127.34 = 55.87/x
  3. Step 3: Cross multiply
    84.84x = 127.34 × 55.87
  4. Step 4: Simplify right side
    84.84x = 7,114.21
  5. Step 5: Solve for x
    x = 7,114.21/84.84
  6. Step 6: Final answer
    x = 83.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.