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Finding the Fourth Proportional to 208,992.69, 288,434.57 and 124,109.78

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Solution

The fourth proportional to 208,992.69, 288,434.57 and 124,109.78 is: 171,286.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,992.69 : 288,434.57 = 124,109.78 : x
  2. Step 2: Convert to fraction form
    208,992.69/288,434.57 = 124,109.78/x
  3. Step 3: Cross multiply
    208,992.69x = 288,434.57 × 124,109.78
  4. Step 4: Simplify right side
    208,992.69x = 35,797,548,964.37
  5. Step 5: Solve for x
    x = 35,797,548,964.37/208,992.69
  6. Step 6: Final answer
    x = 171,286.13

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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.