Home / 206,897.09-309,087.90-131,412.78

Finding the Fourth Proportional to 206,897.09, 309,087.90 and 131,412.78

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Solution

The fourth proportional to 206,897.09, 309,087.90 and 131,412.78 is: 196,320.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,897.09 : 309,087.90 = 131,412.78 : x
  2. Step 2: Convert to fraction form
    206,897.09/309,087.90 = 131,412.78/x
  3. Step 3: Cross multiply
    206,897.09x = 309,087.90 × 131,412.78
  4. Step 4: Simplify right side
    206,897.09x = 40,618,100,203.36
  5. Step 5: Solve for x
    x = 40,618,100,203.36/206,897.09
  6. Step 6: Final answer
    x = 196,320.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.