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Finding the Fourth Proportional to 70.47, 104.99 and 67.91

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Solution

The fourth proportional to 70.47, 104.99 and 67.91 is: 101.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.47 : 104.99 = 67.91 : x
  2. Step 2: Convert to fraction form
    70.47/104.99 = 67.91/x
  3. Step 3: Cross multiply
    70.47x = 104.99 × 67.91
  4. Step 4: Simplify right side
    70.47x = 7,129.01
  5. Step 5: Solve for x
    x = 7,129.01/70.47
  6. Step 6: Final answer
    x = 101.16

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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.