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Finding the Fourth Proportional to 137.57, 189.62 and 93.83

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Solution

The fourth proportional to 137.57, 189.62 and 93.83 is: 129.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.57 : 189.62 = 93.83 : x
  2. Step 2: Convert to fraction form
    137.57/189.62 = 93.83/x
  3. Step 3: Cross multiply
    137.57x = 189.62 × 93.83
  4. Step 4: Simplify right side
    137.57x = 17,791.10
  5. Step 5: Solve for x
    x = 17,791.10/137.57
  6. Step 6: Final answer
    x = 129.33

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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.