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Finding the Fourth Proportional to 163.70, 244.22 and 139.50

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Solution

The fourth proportional to 163.70, 244.22 and 139.50 is: 208.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.70 : 244.22 = 139.50 : x
  2. Step 2: Convert to fraction form
    163.70/244.22 = 139.50/x
  3. Step 3: Cross multiply
    163.70x = 244.22 × 139.50
  4. Step 4: Simplify right side
    163.70x = 34,068.69
  5. Step 5: Solve for x
    x = 34,068.69/163.70
  6. Step 6: Final answer
    x = 208.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.