Home / 81,310.33-121,953.34-28,010.71

Finding the Fourth Proportional to 81,310.33, 121,953.34 and 28,010.71

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Solution

The fourth proportional to 81,310.33, 121,953.34 and 28,010.71 is: 42,011.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,310.33 : 121,953.34 = 28,010.71 : x
  2. Step 2: Convert to fraction form
    81,310.33/121,953.34 = 28,010.71/x
  3. Step 3: Cross multiply
    81,310.33x = 121,953.34 × 28,010.71
  4. Step 4: Simplify right side
    81,310.33x = 3,415,999,640.27
  5. Step 5: Solve for x
    x = 3,415,999,640.27/81,310.33
  6. Step 6: Final answer
    x = 42,011.88

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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.