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Finding the Fourth Proportional to 125.10, 188.79 and 121.08

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Solution

The fourth proportional to 125.10, 188.79 and 121.08 is: 182.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.10 : 188.79 = 121.08 : x
  2. Step 2: Convert to fraction form
    125.10/188.79 = 121.08/x
  3. Step 3: Cross multiply
    125.10x = 188.79 × 121.08
  4. Step 4: Simplify right side
    125.10x = 22,858.69
  5. Step 5: Solve for x
    x = 22,858.69/125.10
  6. Step 6: Final answer
    x = 182.72

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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.