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Finding the Fourth Proportional to 124.40, 186.64 and 121.37

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Solution

The fourth proportional to 124.40, 186.64 and 121.37 is: 182.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.40 : 186.64 = 121.37 : x
  2. Step 2: Convert to fraction form
    124.40/186.64 = 121.37/x
  3. Step 3: Cross multiply
    124.40x = 186.64 × 121.37
  4. Step 4: Simplify right side
    124.40x = 22,651.26
  5. Step 5: Solve for x
    x = 22,651.26/124.40
  6. Step 6: Final answer
    x = 182.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.