Home / 81,520.49-112,450.50-51,257.85

Finding the Fourth Proportional to 81,520.49, 112,450.50 and 51,257.85

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Solution

The fourth proportional to 81,520.49, 112,450.50 and 51,257.85 is: 70,705.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,520.49 : 112,450.50 = 51,257.85 : x
  2. Step 2: Convert to fraction form
    81,520.49/112,450.50 = 51,257.85/x
  3. Step 3: Cross multiply
    81,520.49x = 112,450.50 × 51,257.85
  4. Step 4: Simplify right side
    81,520.49x = 5,763,970,605.14
  5. Step 5: Solve for x
    x = 5,763,970,605.14/81,520.49
  6. Step 6: Final answer
    x = 70,705.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.