Home / 287,727.80-431,721.30-137,910.20

Finding the Fourth Proportional to 287,727.80, 431,721.30 and 137,910.20

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Solution

The fourth proportional to 287,727.80, 431,721.30 and 137,910.20 is: 206,927.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,727.80 : 431,721.30 = 137,910.20 : x
  2. Step 2: Convert to fraction form
    287,727.80/431,721.30 = 137,910.20/x
  3. Step 3: Cross multiply
    287,727.80x = 431,721.30 × 137,910.20
  4. Step 4: Simplify right side
    287,727.80x = 59,538,770,827.26
  5. Step 5: Solve for x
    x = 59,538,770,827.26/287,727.80
  6. Step 6: Final answer
    x = 206,927.42

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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.