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Finding the Fourth Proportional to 72,395.76, 99,908.13 and 40,563.96

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Solution

The fourth proportional to 72,395.76, 99,908.13 and 40,563.96 is: 55,979.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,395.76 : 99,908.13 = 40,563.96 : x
  2. Step 2: Convert to fraction form
    72,395.76/99,908.13 = 40,563.96/x
  3. Step 3: Cross multiply
    72,395.76x = 99,908.13 × 40,563.96
  4. Step 4: Simplify right side
    72,395.76x = 4,052,669,388.99
  5. Step 5: Solve for x
    x = 4,052,669,388.99/72,395.76
  6. Step 6: Final answer
    x = 55,979.37

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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.