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Finding the Fourth Proportional to 50.60, 70.15 and 47.87

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Solution

The fourth proportional to 50.60, 70.15 and 47.87 is: 66.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.60 : 70.15 = 47.87 : x
  2. Step 2: Convert to fraction form
    50.60/70.15 = 47.87/x
  3. Step 3: Cross multiply
    50.60x = 70.15 × 47.87
  4. Step 4: Simplify right side
    50.60x = 3,357.73
  5. Step 5: Solve for x
    x = 3,357.73/50.60
  6. Step 6: Final answer
    x = 66.36

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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.