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Finding the Fourth Proportional to 70.39, 104.96 and 70.26

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Solution

The fourth proportional to 70.39, 104.96 and 70.26 is: 104.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.39 : 104.96 = 70.26 : x
  2. Step 2: Convert to fraction form
    70.39/104.96 = 70.26/x
  3. Step 3: Cross multiply
    70.39x = 104.96 × 70.26
  4. Step 4: Simplify right side
    70.39x = 7,374.49
  5. Step 5: Solve for x
    x = 7,374.49/70.39
  6. Step 6: Final answer
    x = 104.77

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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.