Home / 100,936.24-139,292.40-58,519.78

Finding the Fourth Proportional to 100,936.24, 139,292.40 and 58,519.78

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Solution

The fourth proportional to 100,936.24, 139,292.40 and 58,519.78 is: 80,757.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,936.24 : 139,292.40 = 58,519.78 : x
  2. Step 2: Convert to fraction form
    100,936.24/139,292.40 = 58,519.78/x
  3. Step 3: Cross multiply
    100,936.24x = 139,292.40 × 58,519.78
  4. Step 4: Simplify right side
    100,936.24x = 8,151,360,603.67
  5. Step 5: Solve for x
    x = 8,151,360,603.67/100,936.24
  6. Step 6: Final answer
    x = 80,757.52

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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.