Home / 101,018.03-139,405.85-55,697.78

Finding the Fourth Proportional to 101,018.03, 139,405.85 and 55,697.78

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Solution

The fourth proportional to 101,018.03, 139,405.85 and 55,697.78 is: 76,863.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,018.03 : 139,405.85 = 55,697.78 : x
  2. Step 2: Convert to fraction form
    101,018.03/139,405.85 = 55,697.78/x
  3. Step 3: Cross multiply
    101,018.03x = 139,405.85 × 55,697.78
  4. Step 4: Simplify right side
    101,018.03x = 7,764,595,388.49
  5. Step 5: Solve for x
    x = 7,764,595,388.49/101,018.03
  6. Step 6: Final answer
    x = 76,863.46

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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.