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Finding the Fourth Proportional to 123.46, 184.40 and 97.81

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Solution

The fourth proportional to 123.46, 184.40 and 97.81 is: 146.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.46 : 184.40 = 97.81 : x
  2. Step 2: Convert to fraction form
    123.46/184.40 = 97.81/x
  3. Step 3: Cross multiply
    123.46x = 184.40 × 97.81
  4. Step 4: Simplify right side
    123.46x = 18,036.16
  5. Step 5: Solve for x
    x = 18,036.16/123.46
  6. Step 6: Final answer
    x = 146.09

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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.