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Finding the Fourth Proportional to 118,977.62, 164,132.52 and 71,221.80

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Solution

The fourth proportional to 118,977.62, 164,132.52 and 71,221.80 is: 98,252.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,977.62 : 164,132.52 = 71,221.80 : x
  2. Step 2: Convert to fraction form
    118,977.62/164,132.52 = 71,221.80/x
  3. Step 3: Cross multiply
    118,977.62x = 164,132.52 × 71,221.80
  4. Step 4: Simplify right side
    118,977.62x = 11,689,813,512.94
  5. Step 5: Solve for x
    x = 11,689,813,512.94/118,977.62
  6. Step 6: Final answer
    x = 98,252.21

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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.