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Finding the Fourth Proportional to 123.87, 186.74 and 117.26

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Solution

The fourth proportional to 123.87, 186.74 and 117.26 is: 176.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.87 : 186.74 = 117.26 : x
  2. Step 2: Convert to fraction form
    123.87/186.74 = 117.26/x
  3. Step 3: Cross multiply
    123.87x = 186.74 × 117.26
  4. Step 4: Simplify right side
    123.87x = 21,896.49
  5. Step 5: Solve for x
    x = 21,896.49/123.87
  6. Step 6: Final answer
    x = 176.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.