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Finding the Fourth Proportional to 118,736.94, 163,856.44 and 65,021.78

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Solution

The fourth proportional to 118,736.94, 163,856.44 and 65,021.78 is: 89,729.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,736.94 : 163,856.44 = 65,021.78 : x
  2. Step 2: Convert to fraction form
    118,736.94/163,856.44 = 65,021.78/x
  3. Step 3: Cross multiply
    118,736.94x = 163,856.44 × 65,021.78
  4. Step 4: Simplify right side
    118,736.94x = 10,654,237,393.26
  5. Step 5: Solve for x
    x = 10,654,237,393.26/118,736.94
  6. Step 6: Final answer
    x = 89,729.76

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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.