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Finding the Fourth Proportional to 140.21, 210.79 and 113.34

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Solution

The fourth proportional to 140.21, 210.79 and 113.34 is: 170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.21 : 210.79 = 113.34 : x
  2. Step 2: Convert to fraction form
    140.21/210.79 = 113.34/x
  3. Step 3: Cross multiply
    140.21x = 210.79 × 113.34
  4. Step 4: Simplify right side
    140.21x = 23,890.94
  5. Step 5: Solve for x
    x = 23,890.94/140.21
  6. Step 6: Final answer
    x = 170.40

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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.