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Finding the Fourth Proportional to 79,287.80, 118,935.81 and 20,124.05

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Solution

The fourth proportional to 79,287.80, 118,935.81 and 20,124.05 is: 30,187.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,287.80 : 118,935.81 = 20,124.05 : x
  2. Step 2: Convert to fraction form
    79,287.80/118,935.81 = 20,124.05/x
  3. Step 3: Cross multiply
    79,287.80x = 118,935.81 × 20,124.05
  4. Step 4: Simplify right side
    79,287.80x = 2,393,469,592.55
  5. Step 5: Solve for x
    x = 2,393,469,592.55/79,287.80
  6. Step 6: Final answer
    x = 30,187.11

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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.