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Finding the Fourth Proportional to 118,296.69, 177,265.50 and 86,727.78

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Solution

The fourth proportional to 118,296.69, 177,265.50 and 86,727.78 is: 129,960.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,296.69 : 177,265.50 = 86,727.78 : x
  2. Step 2: Convert to fraction form
    118,296.69/177,265.50 = 86,727.78/x
  3. Step 3: Cross multiply
    118,296.69x = 177,265.50 × 86,727.78
  4. Step 4: Simplify right side
    118,296.69x = 15,373,843,285.59
  5. Step 5: Solve for x
    x = 15,373,843,285.59/118,296.69
  6. Step 6: Final answer
    x = 129,960.05

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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.