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Finding the Fourth Proportional to 50.12, 74.72 and 45.26

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Solution

The fourth proportional to 50.12, 74.72 and 45.26 is: 67.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.12 : 74.72 = 45.26 : x
  2. Step 2: Convert to fraction form
    50.12/74.72 = 45.26/x
  3. Step 3: Cross multiply
    50.12x = 74.72 × 45.26
  4. Step 4: Simplify right side
    50.12x = 3,381.85
  5. Step 5: Solve for x
    x = 3,381.85/50.12
  6. Step 6: Final answer
    x = 67.48

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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.