Home / 143,640-198,219.20-79,977.76

Finding the Fourth Proportional to 143,640, 198,219.20 and 79,977.76

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Solution

The fourth proportional to 143,640, 198,219.20 and 79,977.76 is: 110,367.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,640 : 198,219.20 = 79,977.76 : x
  2. Step 2: Convert to fraction form
    143,640/198,219.20 = 79,977.76/x
  3. Step 3: Cross multiply
    143,640x = 198,219.20 × 79,977.76
  4. Step 4: Simplify right side
    143,640x = 15,853,127,604.99
  5. Step 5: Solve for x
    x = 15,853,127,604.99/143,640
  6. Step 6: Final answer
    x = 110,367.08

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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.