Home / 206,619.77-309,788.16-105,221.54

Finding the Fourth Proportional to 206,619.77, 309,788.16 and 105,221.54

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Solution

The fourth proportional to 206,619.77, 309,788.16 and 105,221.54 is: 157,760.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,619.77 : 309,788.16 = 105,221.54 : x
  2. Step 2: Convert to fraction form
    206,619.77/309,788.16 = 105,221.54/x
  3. Step 3: Cross multiply
    206,619.77x = 309,788.16 × 105,221.54
  4. Step 4: Simplify right side
    206,619.77x = 32,596,387,268.97
  5. Step 5: Solve for x
    x = 32,596,387,268.97/206,619.77
  6. Step 6: Final answer
    x = 157,760.25

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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.