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Finding the Fourth Proportional to 123.67, 170.55 and 106.23

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Solution

The fourth proportional to 123.67, 170.55 and 106.23 is: 146.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.67 : 170.55 = 106.23 : x
  2. Step 2: Convert to fraction form
    123.67/170.55 = 106.23/x
  3. Step 3: Cross multiply
    123.67x = 170.55 × 106.23
  4. Step 4: Simplify right side
    123.67x = 18,117.53
  5. Step 5: Solve for x
    x = 18,117.53/123.67
  6. Step 6: Final answer
    x = 146.50

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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.