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Finding the Fourth Proportional to 128,889.43, 193,308.42 and 43,491.94

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Solution

The fourth proportional to 128,889.43, 193,308.42 and 43,491.94 is: 65,229.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889.43 : 193,308.42 = 43,491.94 : x
  2. Step 2: Convert to fraction form
    128,889.43/193,308.42 = 43,491.94/x
  3. Step 3: Cross multiply
    128,889.43x = 193,308.42 × 43,491.94
  4. Step 4: Simplify right side
    128,889.43x = 8,407,357,883.96
  5. Step 5: Solve for x
    x = 8,407,357,883.96/128,889.43
  6. Step 6: Final answer
    x = 65,229.23

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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.