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Finding the Fourth Proportional to 118,310.63, 177,286.38 and 86,741.71

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Solution

The fourth proportional to 118,310.63, 177,286.38 and 86,741.71 is: 129,980.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,310.63 : 177,286.38 = 86,741.71 : x
  2. Step 2: Convert to fraction form
    118,310.63/177,286.38 = 86,741.71/x
  3. Step 3: Cross multiply
    118,310.63x = 177,286.38 × 86,741.71
  4. Step 4: Simplify right side
    118,310.63x = 15,378,123,760.91
  5. Step 5: Solve for x
    x = 15,378,123,760.91/118,310.63
  6. Step 6: Final answer
    x = 129,980.91

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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.