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Finding the Fourth Proportional to 77,571.81, 107,042.79 and 43,578.45

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Solution

The fourth proportional to 77,571.81, 107,042.79 and 43,578.45 is: 60,134.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,571.81 : 107,042.79 = 43,578.45 : x
  2. Step 2: Convert to fraction form
    77,571.81/107,042.79 = 43,578.45/x
  3. Step 3: Cross multiply
    77,571.81x = 107,042.79 × 43,578.45
  4. Step 4: Simplify right side
    77,571.81x = 4,664,758,871.88
  5. Step 5: Solve for x
    x = 4,664,758,871.88/77,571.81
  6. Step 6: Final answer
    x = 60,134.72

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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.