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Finding the Fourth Proportional to 140.54, 210.77 and 75.53

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Solution

The fourth proportional to 140.54, 210.77 and 75.53 is: 113.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.54 : 210.77 = 75.53 : x
  2. Step 2: Convert to fraction form
    140.54/210.77 = 75.53/x
  3. Step 3: Cross multiply
    140.54x = 210.77 × 75.53
  4. Step 4: Simplify right side
    140.54x = 15,919.89
  5. Step 5: Solve for x
    x = 15,919.89/140.54
  6. Step 6: Final answer
    x = 113.28

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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.