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Finding the Fourth Proportional to 164.31, 226.17 and 139.47

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Solution

The fourth proportional to 164.31, 226.17 and 139.47 is: 191.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.31 : 226.17 = 139.47 : x
  2. Step 2: Convert to fraction form
    164.31/226.17 = 139.47/x
  3. Step 3: Cross multiply
    164.31x = 226.17 × 139.47
  4. Step 4: Simplify right side
    164.31x = 31,543.93
  5. Step 5: Solve for x
    x = 31,543.93/164.31
  6. Step 6: Final answer
    x = 191.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.