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Finding the Fourth Proportional to 123.34, 170.26 and 113.62

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Solution

The fourth proportional to 123.34, 170.26 and 113.62 is: 156.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.34 : 170.26 = 113.62 : x
  2. Step 2: Convert to fraction form
    123.34/170.26 = 113.62/x
  3. Step 3: Cross multiply
    123.34x = 170.26 × 113.62
  4. Step 4: Simplify right side
    123.34x = 19,344.94
  5. Step 5: Solve for x
    x = 19,344.94/123.34
  6. Step 6: Final answer
    x = 156.84

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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.