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Finding the Fourth Proportional to 49.03, 67.61 and 30.60

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Solution

The fourth proportional to 49.03, 67.61 and 30.60 is: 42.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.03 : 67.61 = 30.60 : x
  2. Step 2: Convert to fraction form
    49.03/67.61 = 30.60/x
  3. Step 3: Cross multiply
    49.03x = 67.61 × 30.60
  4. Step 4: Simplify right side
    49.03x = 2,068.94
  5. Step 5: Solve for x
    x = 2,068.94/49.03
  6. Step 6: Final answer
    x = 42.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.