Home / 100,982.89-139,350.05-55,658.37

Finding the Fourth Proportional to 100,982.89, 139,350.05 and 55,658.37

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Solution

The fourth proportional to 100,982.89, 139,350.05 and 55,658.37 is: 76,805.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,982.89 : 139,350.05 = 55,658.37 : x
  2. Step 2: Convert to fraction form
    100,982.89/139,350.05 = 55,658.37/x
  3. Step 3: Cross multiply
    100,982.89x = 139,350.05 × 55,658.37
  4. Step 4: Simplify right side
    100,982.89x = 7,755,996,938.87
  5. Step 5: Solve for x
    x = 7,755,996,938.87/100,982.89
  6. Step 6: Final answer
    x = 76,805.06

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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.