Home / 68,518.90-102,789.44-21,122.91

Finding the Fourth Proportional to 68,518.90, 102,789.44 and 21,122.91

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Solution

The fourth proportional to 68,518.90, 102,789.44 and 21,122.91 is: 31,687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,518.90 : 102,789.44 = 21,122.91 : x
  2. Step 2: Convert to fraction form
    68,518.90/102,789.44 = 21,122.91/x
  3. Step 3: Cross multiply
    68,518.90x = 102,789.44 × 21,122.91
  4. Step 4: Simplify right side
    68,518.90x = 2,171,211,630.02
  5. Step 5: Solve for x
    x = 2,171,211,630.02/68,518.90
  6. Step 6: Final answer
    x = 31,687.78

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1.5x scale

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.