Home / 100,747.49-139,028.64-54,805.70

Finding the Fourth Proportional to 100,747.49, 139,028.64 and 54,805.70

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Solution

The fourth proportional to 100,747.49, 139,028.64 and 54,805.70 is: 75,630.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,747.49 : 139,028.64 = 54,805.70 : x
  2. Step 2: Convert to fraction form
    100,747.49/139,028.64 = 54,805.70/x
  3. Step 3: Cross multiply
    100,747.49x = 139,028.64 × 54,805.70
  4. Step 4: Simplify right side
    100,747.49x = 7,619,561,935.25
  5. Step 5: Solve for x
    x = 7,619,561,935.25/100,747.49
  6. Step 6: Final answer
    x = 75,630.29

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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.