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Finding the Fourth Proportional to 84.48, 126.95 and 79.01

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Solution

The fourth proportional to 84.48, 126.95 and 79.01 is: 118.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.48 : 126.95 = 79.01 : x
  2. Step 2: Convert to fraction form
    84.48/126.95 = 79.01/x
  3. Step 3: Cross multiply
    84.48x = 126.95 × 79.01
  4. Step 4: Simplify right side
    84.48x = 10,029.29
  5. Step 5: Solve for x
    x = 10,029.29/84.48
  6. Step 6: Final answer
    x = 118.72

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