Home / 287,823.97-431,736.77-100,791.73

Finding the Fourth Proportional to 287,823.97, 431,736.77 and 100,791.73

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Solution

The fourth proportional to 287,823.97, 431,736.77 and 100,791.73 is: 151,187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,823.97 : 431,736.77 = 100,791.73 : x
  2. Step 2: Convert to fraction form
    287,823.97/431,736.77 = 100,791.73/x
  3. Step 3: Cross multiply
    287,823.97x = 431,736.77 × 100,791.73
  4. Step 4: Simplify right side
    287,823.97x = 43,515,495,952.91
  5. Step 5: Solve for x
    x = 43,515,495,952.91/287,823.97
  6. Step 6: Final answer
    x = 151,187.88

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1.5x scale

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.