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Finding the Fourth Proportional to 70.66, 105.26 and 70.12

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Solution

The fourth proportional to 70.66, 105.26 and 70.12 is: 104.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.66 : 105.26 = 70.12 : x
  2. Step 2: Convert to fraction form
    70.66/105.26 = 70.12/x
  3. Step 3: Cross multiply
    70.66x = 105.26 × 70.12
  4. Step 4: Simplify right side
    70.66x = 7,380.83
  5. Step 5: Solve for x
    x = 7,380.83/70.66
  6. Step 6: Final answer
    x = 104.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.