Home / 103,828.10-155,414.10-81,520.70

Finding the Fourth Proportional to 103,828.10, 155,414.10 and 81,520.70

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Solution

The fourth proportional to 103,828.10, 155,414.10 and 81,520.70 is: 122,023.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,828.10 : 155,414.10 = 81,520.70 : x
  2. Step 2: Convert to fraction form
    103,828.10/155,414.10 = 81,520.70/x
  3. Step 3: Cross multiply
    103,828.10x = 155,414.10 × 81,520.70
  4. Step 4: Simplify right side
    103,828.10x = 12,669,466,221.87
  5. Step 5: Solve for x
    x = 12,669,466,221.87/103,828.10
  6. Step 6: Final answer
    x = 122,023.48

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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.