Home / 136,748.85-188,694.75-76,311.78

Finding the Fourth Proportional to 136,748.85, 188,694.75 and 76,311.78

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Solution

The fourth proportional to 136,748.85, 188,694.75 and 76,311.78 is: 105,299.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,748.85 : 188,694.75 = 76,311.78 : x
  2. Step 2: Convert to fraction form
    136,748.85/188,694.75 = 76,311.78/x
  3. Step 3: Cross multiply
    136,748.85x = 188,694.75 × 76,311.78
  4. Step 4: Simplify right side
    136,748.85x = 14,399,632,249.16
  5. Step 5: Solve for x
    x = 14,399,632,249.16/136,748.85
  6. Step 6: Final answer
    x = 105,299.84

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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.