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Finding the Fourth Proportional to 49.77, 74.30 and 48.09

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Solution

The fourth proportional to 49.77, 74.30 and 48.09 is: 71.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.77 : 74.30 = 48.09 : x
  2. Step 2: Convert to fraction form
    49.77/74.30 = 48.09/x
  3. Step 3: Cross multiply
    49.77x = 74.30 × 48.09
  4. Step 4: Simplify right side
    49.77x = 3,572.85
  5. Step 5: Solve for x
    x = 3,572.85/49.77
  6. Step 6: Final answer
    x = 71.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.