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Finding the Fourth Proportional to 72,697.29, 100,331.22 and 40,865.50

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Solution

The fourth proportional to 72,697.29, 100,331.22 and 40,865.50 is: 56,399.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,697.29 : 100,331.22 = 40,865.50 : x
  2. Step 2: Convert to fraction form
    72,697.29/100,331.22 = 40,865.50/x
  3. Step 3: Cross multiply
    72,697.29x = 100,331.22 × 40,865.50
  4. Step 4: Simplify right side
    72,697.29x = 4,100,085,470.91
  5. Step 5: Solve for x
    x = 4,100,085,470.91/72,697.29
  6. Step 6: Final answer
    x = 56,399.43

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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.