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Finding the Fourth Proportional to 70.93, 106.31 and 36.60

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Solution

The fourth proportional to 70.93, 106.31 and 36.60 is: 54.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.93 : 106.31 = 36.60 : x
  2. Step 2: Convert to fraction form
    70.93/106.31 = 36.60/x
  3. Step 3: Cross multiply
    70.93x = 106.31 × 36.60
  4. Step 4: Simplify right side
    70.93x = 3,891.24
  5. Step 5: Solve for x
    x = 3,891.24/70.93
  6. Step 6: Final answer
    x = 54.86

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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.