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Finding the Fourth Proportional to 50.89, 70.17 and 39.10

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Solution

The fourth proportional to 50.89, 70.17 and 39.10 is: 53.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.89 : 70.17 = 39.10 : x
  2. Step 2: Convert to fraction form
    50.89/70.17 = 39.10/x
  3. Step 3: Cross multiply
    50.89x = 70.17 × 39.10
  4. Step 4: Simplify right side
    50.89x = 2,743.10
  5. Step 5: Solve for x
    x = 2,743.10/50.89
  6. Step 6: Final answer
    x = 53.91

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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.