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Finding the Fourth Proportional to 70.43, 104.91 and 70.03

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Solution

The fourth proportional to 70.43, 104.91 and 70.03 is: 104.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.43 : 104.91 = 70.03 : x
  2. Step 2: Convert to fraction form
    70.43/104.91 = 70.03/x
  3. Step 3: Cross multiply
    70.43x = 104.91 × 70.03
  4. Step 4: Simplify right side
    70.43x = 7,346.85
  5. Step 5: Solve for x
    x = 7,346.85/70.43
  6. Step 6: Final answer
    x = 104.31

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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.