Home / 206,338.47-309,535.25-81,650.31

Finding the Fourth Proportional to 206,338.47, 309,535.25 and 81,650.31

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Solution

The fourth proportional to 206,338.47, 309,535.25 and 81,650.31 is: 122,486.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,338.47 : 309,535.25 = 81,650.31 : x
  2. Step 2: Convert to fraction form
    206,338.47/309,535.25 = 81,650.31/x
  3. Step 3: Cross multiply
    206,338.47x = 309,535.25 × 81,650.31
  4. Step 4: Simplify right side
    206,338.47x = 25,273,648,710.18
  5. Step 5: Solve for x
    x = 25,273,648,710.18/206,338.47
  6. Step 6: Final answer
    x = 122,486.36

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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.