Home / 100,939.95-139,295.30-55,622.12

Finding the Fourth Proportional to 100,939.95, 139,295.30 and 55,622.12

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Solution

The fourth proportional to 100,939.95, 139,295.30 and 55,622.12 is: 76,757.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.95 : 139,295.30 = 55,622.12 : x
  2. Step 2: Convert to fraction form
    100,939.95/139,295.30 = 55,622.12/x
  3. Step 3: Cross multiply
    100,939.95x = 139,295.30 × 55,622.12
  4. Step 4: Simplify right side
    100,939.95x = 7,747,898,917.45
  5. Step 5: Solve for x
    x = 7,747,898,917.45/100,939.95
  6. Step 6: Final answer
    x = 76,757.51

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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.