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Finding the Fourth Proportional to 189.93, 262.10 and 123.56

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Solution

The fourth proportional to 189.93, 262.10 and 123.56 is: 170.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.93 : 262.10 = 123.56 : x
  2. Step 2: Convert to fraction form
    189.93/262.10 = 123.56/x
  3. Step 3: Cross multiply
    189.93x = 262.10 × 123.56
  4. Step 4: Simplify right side
    189.93x = 32,385.73
  5. Step 5: Solve for x
    x = 32,385.73/189.93
  6. Step 6: Final answer
    x = 170.52

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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.