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Finding the Fourth Proportional to 216,634.86, 324,960.66 and 66,861.72

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Solution

The fourth proportional to 216,634.86, 324,960.66 and 66,861.72 is: 100,295.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,634.86 : 324,960.66 = 66,861.72 : x
  2. Step 2: Convert to fraction form
    216,634.86/324,960.66 = 66,861.72/x
  3. Step 3: Cross multiply
    216,634.86x = 324,960.66 × 66,861.72
  4. Step 4: Simplify right side
    216,634.86x = 21,727,428,659.94
  5. Step 5: Solve for x
    x = 21,727,428,659.94/216,634.86
  6. Step 6: Final answer
    x = 100,295.16

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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.