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Finding the Fourth Proportional to 73,112.92, 109,713.12 and 67,164.28

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Solution

The fourth proportional to 73,112.92, 109,713.12 and 67,164.28 is: 100,786.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,112.92 : 109,713.12 = 67,164.28 : x
  2. Step 2: Convert to fraction form
    73,112.92/109,713.12 = 67,164.28/x
  3. Step 3: Cross multiply
    73,112.92x = 109,713.12 × 67,164.28
  4. Step 4: Simplify right side
    73,112.92x = 7,368,802,711.35
  5. Step 5: Solve for x
    x = 7,368,802,711.35/73,112.92
  6. Step 6: Final answer
    x = 100,786.60

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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.