Home / 100,761.12-139,042.44-58,322.52

Finding the Fourth Proportional to 100,761.12, 139,042.44 and 58,322.52

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Solution

The fourth proportional to 100,761.12, 139,042.44 and 58,322.52 is: 80,480.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,761.12 : 139,042.44 = 58,322.52 : x
  2. Step 2: Convert to fraction form
    100,761.12/139,042.44 = 58,322.52/x
  3. Step 3: Cross multiply
    100,761.12x = 139,042.44 × 58,322.52
  4. Step 4: Simplify right side
    100,761.12x = 8,109,305,487.75
  5. Step 5: Solve for x
    x = 8,109,305,487.75/100,761.12
  6. Step 6: Final answer
    x = 80,480.50

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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.