Home / 77,672.32-107,186.78-43,680.80

Finding the Fourth Proportional to 77,672.32, 107,186.78 and 43,680.80

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Solution

The fourth proportional to 77,672.32, 107,186.78 and 43,680.80 is: 60,278.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,672.32 : 107,186.78 = 43,680.80 : x
  2. Step 2: Convert to fraction form
    77,672.32/107,186.78 = 43,680.80/x
  3. Step 3: Cross multiply
    77,672.32x = 107,186.78 × 43,680.80
  4. Step 4: Simplify right side
    77,672.32x = 4,682,004,299.82
  5. Step 5: Solve for x
    x = 4,682,004,299.82/77,672.32
  6. Step 6: Final answer
    x = 60,278.93

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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.