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Finding the Fourth Proportional to 50.24, 74.78 and 49.12

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Solution

The fourth proportional to 50.24, 74.78 and 49.12 is: 73.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.24 : 74.78 = 49.12 : x
  2. Step 2: Convert to fraction form
    50.24/74.78 = 49.12/x
  3. Step 3: Cross multiply
    50.24x = 74.78 × 49.12
  4. Step 4: Simplify right side
    50.24x = 3,673.19
  5. Step 5: Solve for x
    x = 3,673.19/50.24
  6. Step 6: Final answer
    x = 73.11

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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.