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Finding the Fourth Proportional to 139.43, 209.28 and 93.26

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Solution

The fourth proportional to 139.43, 209.28 and 93.26 is: 139.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.43 : 209.28 = 93.26 : x
  2. Step 2: Convert to fraction form
    139.43/209.28 = 93.26/x
  3. Step 3: Cross multiply
    139.43x = 209.28 × 93.26
  4. Step 4: Simplify right side
    139.43x = 19,516.41
  5. Step 5: Solve for x
    x = 19,516.41/139.43
  6. Step 6: Final answer
    x = 139.98

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.