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Finding the Fourth Proportional to 70.34, 104.83 and 67.32

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Solution

The fourth proportional to 70.34, 104.83 and 67.32 is: 100.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.34 : 104.83 = 67.32 : x
  2. Step 2: Convert to fraction form
    70.34/104.83 = 67.32/x
  3. Step 3: Cross multiply
    70.34x = 104.83 × 67.32
  4. Step 4: Simplify right side
    70.34x = 7,056.99
  5. Step 5: Solve for x
    x = 7,056.99/70.34
  6. Step 6: Final answer
    x = 100.33

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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.