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Finding the Fourth Proportional to 79.44, 109.19 and 70.18

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Solution

The fourth proportional to 79.44, 109.19 and 70.18 is: 96.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.44 : 109.19 = 70.18 : x
  2. Step 2: Convert to fraction form
    79.44/109.19 = 70.18/x
  3. Step 3: Cross multiply
    79.44x = 109.19 × 70.18
  4. Step 4: Simplify right side
    79.44x = 7,662.95
  5. Step 5: Solve for x
    x = 7,662.95/79.44
  6. Step 6: Final answer
    x = 96.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.