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Finding the Fourth Proportional to 73,131.91, 100,920.78 and 40,867.03

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Solution

The fourth proportional to 73,131.91, 100,920.78 and 40,867.03 is: 56,395.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,131.91 : 100,920.78 = 40,867.03 : x
  2. Step 2: Convert to fraction form
    73,131.91/100,920.78 = 40,867.03/x
  3. Step 3: Cross multiply
    73,131.91x = 100,920.78 × 40,867.03
  4. Step 4: Simplify right side
    73,131.91x = 4,124,332,543.88
  5. Step 5: Solve for x
    x = 4,124,332,543.88/73,131.91
  6. Step 6: Final answer
    x = 56,395.80

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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.