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Finding the Fourth Proportional to 136,290.11, 188,078.91 and 75,859.79

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Solution

The fourth proportional to 136,290.11, 188,078.91 and 75,859.79 is: 104,685.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,290.11 : 188,078.91 = 75,859.79 : x
  2. Step 2: Convert to fraction form
    136,290.11/188,078.91 = 75,859.79/x
  3. Step 3: Cross multiply
    136,290.11x = 188,078.91 × 75,859.79
  4. Step 4: Simplify right side
    136,290.11x = 14,267,626,616.03
  5. Step 5: Solve for x
    x = 14,267,626,616.03/136,290.11
  6. Step 6: Final answer
    x = 104,685.71

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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.