Home / 206,731.10-309,899.79-66,391.31

Finding the Fourth Proportional to 206,731.10, 309,899.79 and 66,391.31

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Solution

The fourth proportional to 206,731.10, 309,899.79 and 66,391.31 is: 99,523.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,731.10 : 309,899.79 = 66,391.31 : x
  2. Step 2: Convert to fraction form
    206,731.10/309,899.79 = 66,391.31/x
  3. Step 3: Cross multiply
    206,731.10x = 309,899.79 × 66,391.31
  4. Step 4: Simplify right side
    206,731.10x = 20,574,653,801.57
  5. Step 5: Solve for x
    x = 20,574,653,801.57/206,731.10
  6. Step 6: Final answer
    x = 99,523.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.