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Finding the Fourth Proportional to 72,752.92, 100,398.06 and 40,921.80

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Solution

The fourth proportional to 72,752.92, 100,398.06 and 40,921.80 is: 56,471.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,752.92 : 100,398.06 = 40,921.80 : x
  2. Step 2: Convert to fraction form
    72,752.92/100,398.06 = 40,921.80/x
  3. Step 3: Cross multiply
    72,752.92x = 100,398.06 × 40,921.80
  4. Step 4: Simplify right side
    72,752.92x = 4,108,469,331.71
  5. Step 5: Solve for x
    x = 4,108,469,331.71/72,752.92
  6. Step 6: Final answer
    x = 56,471.54

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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.