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Finding the Fourth Proportional to 50.57, 70.15 and 48.75

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Solution

The fourth proportional to 50.57, 70.15 and 48.75 is: 67.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.57 : 70.15 = 48.75 : x
  2. Step 2: Convert to fraction form
    50.57/70.15 = 48.75/x
  3. Step 3: Cross multiply
    50.57x = 70.15 × 48.75
  4. Step 4: Simplify right side
    50.57x = 3,419.57
  5. Step 5: Solve for x
    x = 3,419.57/50.57
  6. Step 6: Final answer
    x = 67.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.