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Finding the Fourth Proportional to 217,310.50, 299,889.57 and 126,729.28

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Solution

The fourth proportional to 217,310.50, 299,889.57 and 126,729.28 is: 174,887.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,310.50 : 299,889.57 = 126,729.28 : x
  2. Step 2: Convert to fraction form
    217,310.50/299,889.57 = 126,729.28/x
  3. Step 3: Cross multiply
    217,310.50x = 299,889.57 × 126,729.28
  4. Step 4: Simplify right side
    217,310.50x = 38,004,789,285.61
  5. Step 5: Solve for x
    x = 38,004,789,285.61/217,310.50
  6. Step 6: Final answer
    x = 174,887.04

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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.