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Finding the Fourth Proportional to 140.34, 210.56 and 75.41

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Solution

The fourth proportional to 140.34, 210.56 and 75.41 is: 113.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.34 : 210.56 = 75.41 : x
  2. Step 2: Convert to fraction form
    140.34/210.56 = 75.41/x
  3. Step 3: Cross multiply
    140.34x = 210.56 × 75.41
  4. Step 4: Simplify right side
    140.34x = 15,878.33
  5. Step 5: Solve for x
    x = 15,878.33/140.34
  6. Step 6: Final answer
    x = 113.14

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Why These Related Problems?

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