Home / 143,220.72-197,651.16-79,556.40

Finding the Fourth Proportional to 143,220.72, 197,651.16 and 79,556.40

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Solution

The fourth proportional to 143,220.72, 197,651.16 and 79,556.40 is: 109,791.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,220.72 : 197,651.16 = 79,556.40 : x
  2. Step 2: Convert to fraction form
    143,220.72/197,651.16 = 79,556.40/x
  3. Step 3: Cross multiply
    143,220.72x = 197,651.16 × 79,556.40
  4. Step 4: Simplify right side
    143,220.72x = 15,724,414,745.42
  5. Step 5: Solve for x
    x = 15,724,414,745.42/143,220.72
  6. Step 6: Final answer
    x = 109,791.48

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1.5x scale

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.