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Finding the Fourth Proportional to 68,246.70, 102,370.31 and 20,861.62

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Solution

The fourth proportional to 68,246.70, 102,370.31 and 20,861.62 is: 31,292.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,246.70 : 102,370.31 = 20,861.62 : x
  2. Step 2: Convert to fraction form
    68,246.70/102,370.31 = 20,861.62/x
  3. Step 3: Cross multiply
    68,246.70x = 102,370.31 × 20,861.62
  4. Step 4: Simplify right side
    68,246.70x = 2,135,610,341.85
  5. Step 5: Solve for x
    x = 2,135,610,341.85/68,246.70
  6. Step 6: Final answer
    x = 31,292.51

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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.