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Finding the Fourth Proportional to 72,581.01, 100,160.31 and 40,749.90

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Solution

The fourth proportional to 72,581.01, 100,160.31 and 40,749.90 is: 56,234.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581.01 : 100,160.31 = 40,749.90 : x
  2. Step 2: Convert to fraction form
    72,581.01/100,160.31 = 40,749.90/x
  3. Step 3: Cross multiply
    72,581.01x = 100,160.31 × 40,749.90
  4. Step 4: Simplify right side
    72,581.01x = 4,081,522,616.47
  5. Step 5: Solve for x
    x = 4,081,522,616.47/72,581.01
  6. Step 6: Final answer
    x = 56,234.03

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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.