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Finding the Fourth Proportional to 50.07, 75.08 and 21.17

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Solution

The fourth proportional to 50.07, 75.08 and 21.17 is: 31.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.07 : 75.08 = 21.17 : x
  2. Step 2: Convert to fraction form
    50.07/75.08 = 21.17/x
  3. Step 3: Cross multiply
    50.07x = 75.08 × 21.17
  4. Step 4: Simplify right side
    50.07x = 1,589.44
  5. Step 5: Solve for x
    x = 1,589.44/50.07
  6. Step 6: Final answer
    x = 31.74

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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.