Home / 206,830.64-285,556.92-143,145.20

Finding the Fourth Proportional to 206,830.64, 285,556.92 and 143,145.20

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Solution

The fourth proportional to 206,830.64, 285,556.92 and 143,145.20 is: 197,630.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,830.64 : 285,556.92 = 143,145.20 : x
  2. Step 2: Convert to fraction form
    206,830.64/285,556.92 = 143,145.20/x
  3. Step 3: Cross multiply
    206,830.64x = 285,556.92 × 143,145.20
  4. Step 4: Simplify right side
    206,830.64x = 40,876,102,424.78
  5. Step 5: Solve for x
    x = 40,876,102,424.78/206,830.64
  6. Step 6: Final answer
    x = 197,630.79

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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.