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Finding the Fourth Proportional to 72,809.56, 100,469.46 and 40,977.91

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Solution

The fourth proportional to 72,809.56, 100,469.46 and 40,977.91 is: 56,545.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,809.56 : 100,469.46 = 40,977.91 : x
  2. Step 2: Convert to fraction form
    72,809.56/100,469.46 = 40,977.91/x
  3. Step 3: Cross multiply
    72,809.56x = 100,469.46 × 40,977.91
  4. Step 4: Simplify right side
    72,809.56x = 4,117,028,489.63
  5. Step 5: Solve for x
    x = 4,117,028,489.63/72,809.56
  6. Step 6: Final answer
    x = 56,545.16

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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.