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Finding the Fourth Proportional to 79,687.45, 109,969.42 and 43,878.28

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Solution

The fourth proportional to 79,687.45, 109,969.42 and 43,878.28 is: 60,552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.45 : 109,969.42 = 43,878.28 : x
  2. Step 2: Convert to fraction form
    79,687.45/109,969.42 = 43,878.28/x
  3. Step 3: Cross multiply
    79,687.45x = 109,969.42 × 43,878.28
  4. Step 4: Simplify right side
    79,687.45x = 4,825,269,338.74
  5. Step 5: Solve for x
    x = 4,825,269,338.74/79,687.45
  6. Step 6: Final answer
    x = 60,552.44

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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.