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Finding the Fourth Proportional to 70.02, 104.52 and 67.61

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Solution

The fourth proportional to 70.02, 104.52 and 67.61 is: 100.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.02 : 104.52 = 67.61 : x
  2. Step 2: Convert to fraction form
    70.02/104.52 = 67.61/x
  3. Step 3: Cross multiply
    70.02x = 104.52 × 67.61
  4. Step 4: Simplify right side
    70.02x = 7,066.60
  5. Step 5: Solve for x
    x = 7,066.60/70.02
  6. Step 6: Final answer
    x = 100.93

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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.