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Finding the Fourth Proportional to 84.19, 127.01 and 83.96

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Solution

The fourth proportional to 84.19, 127.01 and 83.96 is: 126.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.19 : 127.01 = 83.96 : x
  2. Step 2: Convert to fraction form
    84.19/127.01 = 83.96/x
  3. Step 3: Cross multiply
    84.19x = 127.01 × 83.96
  4. Step 4: Simplify right side
    84.19x = 10,663.76
  5. Step 5: Solve for x
    x = 10,663.76/84.19
  6. Step 6: Final answer
    x = 126.67

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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.