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Finding the Fourth Proportional to 136,662.72, 188,593.25 and 75,409.49

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Solution

The fourth proportional to 136,662.72, 188,593.25 and 75,409.49 is: 104,064.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,662.72 : 188,593.25 = 75,409.49 : x
  2. Step 2: Convert to fraction form
    136,662.72/188,593.25 = 75,409.49/x
  3. Step 3: Cross multiply
    136,662.72x = 188,593.25 × 75,409.49
  4. Step 4: Simplify right side
    136,662.72x = 14,221,719,479.93
  5. Step 5: Solve for x
    x = 14,221,719,479.93/136,662.72
  6. Step 6: Final answer
    x = 104,064.37

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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.