Home / 81,209.28-121,827.90-27,898.74

Finding the Fourth Proportional to 81,209.28, 121,827.90 and 27,898.74

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Solution

The fourth proportional to 81,209.28, 121,827.90 and 27,898.74 is: 41,852.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,209.28 : 121,827.90 = 27,898.74 : x
  2. Step 2: Convert to fraction form
    81,209.28/121,827.90 = 27,898.74/x
  3. Step 3: Cross multiply
    81,209.28x = 121,827.90 × 27,898.74
  4. Step 4: Simplify right side
    81,209.28x = 3,398,844,906.85
  5. Step 5: Solve for x
    x = 3,398,844,906.85/81,209.28
  6. Step 6: Final answer
    x = 41,852.91

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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.