Home / 143,142.72-197,535.92-79,480.76

Finding the Fourth Proportional to 143,142.72, 197,535.92 and 79,480.76

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Solution

The fourth proportional to 143,142.72, 197,535.92 and 79,480.76 is: 109,682.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,142.72 : 197,535.92 = 79,480.76 : x
  2. Step 2: Convert to fraction form
    143,142.72/197,535.92 = 79,480.76/x
  3. Step 3: Cross multiply
    143,142.72x = 197,535.92 × 79,480.76
  4. Step 4: Simplify right side
    143,142.72x = 15,700,305,048.90
  5. Step 5: Solve for x
    x = 15,700,305,048.90/143,142.72
  6. Step 6: Final answer
    x = 109,682.87

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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.