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Finding the Fourth Proportional to 216,513.80, 324,821.90 and 68,769.80

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Solution

The fourth proportional to 216,513.80, 324,821.90 and 68,769.80 is: 103,170.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,513.80 : 324,821.90 = 68,769.80 : x
  2. Step 2: Convert to fraction form
    216,513.80/324,821.90 = 68,769.80/x
  3. Step 3: Cross multiply
    216,513.80x = 324,821.90 × 68,769.80
  4. Step 4: Simplify right side
    216,513.80x = 22,337,937,098.62
  5. Step 5: Solve for x
    x = 22,337,937,098.62/216,513.80
  6. Step 6: Final answer
    x = 103,170.96

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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.