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Finding the Fourth Proportional to 167.39, 230.90 and 100.99

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Solution

The fourth proportional to 167.39, 230.90 and 100.99 is: 139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.39 : 230.90 = 100.99 : x
  2. Step 2: Convert to fraction form
    167.39/230.90 = 100.99/x
  3. Step 3: Cross multiply
    167.39x = 230.90 × 100.99
  4. Step 4: Simplify right side
    167.39x = 23,317.51
  5. Step 5: Solve for x
    x = 23,317.51/167.39
  6. Step 6: Final answer
    x = 139.30

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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.