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Finding the Fourth Proportional to 118,778.28, 163,908.20 and 65,063.54

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Solution

The fourth proportional to 118,778.28, 163,908.20 and 65,063.54 is: 89,784.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,778.28 : 163,908.20 = 65,063.54 : x
  2. Step 2: Convert to fraction form
    118,778.28/163,908.20 = 65,063.54/x
  3. Step 3: Cross multiply
    118,778.28x = 163,908.20 × 65,063.54
  4. Step 4: Simplify right side
    118,778.28x = 10,664,447,070.15
  5. Step 5: Solve for x
    x = 10,664,447,070.15/118,778.28
  6. Step 6: Final answer
    x = 89,784.49

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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.