Home / 85,979.26-129,039.96-43,890.44

Finding the Fourth Proportional to 85,979.26, 129,039.96 and 43,890.44

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Solution

The fourth proportional to 85,979.26, 129,039.96 and 43,890.44 is: 65,871.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.26 : 129,039.96 = 43,890.44 : x
  2. Step 2: Convert to fraction form
    85,979.26/129,039.96 = 43,890.44/x
  3. Step 3: Cross multiply
    85,979.26x = 129,039.96 × 43,890.44
  4. Step 4: Simplify right side
    85,979.26x = 5,663,620,621.98
  5. Step 5: Solve for x
    x = 5,663,620,621.98/85,979.26
  6. Step 6: Final answer
    x = 65,871.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.