Home / 287,821.70-431,732.55-100,833.20

Finding the Fourth Proportional to 287,821.70, 431,732.55 and 100,833.20

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Solution

The fourth proportional to 287,821.70, 431,732.55 and 100,833.20 is: 151,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,821.70 : 431,732.55 = 100,833.20 : x
  2. Step 2: Convert to fraction form
    287,821.70/431,732.55 = 100,833.20/x
  3. Step 3: Cross multiply
    287,821.70x = 431,732.55 × 100,833.20
  4. Step 4: Simplify right side
    287,821.70x = 43,532,974,560.66
  5. Step 5: Solve for x
    x = 43,532,974,560.66/287,821.70
  6. Step 6: Final answer
    x = 151,249.80

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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.