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Finding the Fourth Proportional to 139.94, 209.99 and 62.96

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Solution

The fourth proportional to 139.94, 209.99 and 62.96 is: 94.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.94 : 209.99 = 62.96 : x
  2. Step 2: Convert to fraction form
    139.94/209.99 = 62.96/x
  3. Step 3: Cross multiply
    139.94x = 209.99 × 62.96
  4. Step 4: Simplify right side
    139.94x = 13,220.97
  5. Step 5: Solve for x
    x = 13,220.97/139.94
  6. Step 6: Final answer
    x = 94.48

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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.