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Finding the Fourth Proportional to 140.03, 209.98 and 79.12

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Solution

The fourth proportional to 140.03, 209.98 and 79.12 is: 118.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.03 : 209.98 = 79.12 : x
  2. Step 2: Convert to fraction form
    140.03/209.98 = 79.12/x
  3. Step 3: Cross multiply
    140.03x = 209.98 × 79.12
  4. Step 4: Simplify right side
    140.03x = 16,612.17
  5. Step 5: Solve for x
    x = 16,612.17/140.03
  6. Step 6: Final answer
    x = 118.63

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.