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Finding the Fourth Proportional to 72,563.65, 100,138.03 and 40,298.29

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Solution

The fourth proportional to 72,563.65, 100,138.03 and 40,298.29 is: 55,611.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,563.65 : 100,138.03 = 40,298.29 : x
  2. Step 2: Convert to fraction form
    72,563.65/100,138.03 = 40,298.29/x
  3. Step 3: Cross multiply
    72,563.65x = 100,138.03 × 40,298.29
  4. Step 4: Simplify right side
    72,563.65x = 4,035,391,372.97
  5. Step 5: Solve for x
    x = 4,035,391,372.97/72,563.65
  6. Step 6: Final answer
    x = 55,611.75

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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.