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Finding the Fourth Proportional to 72,229.43, 99,676.04 and 40,398.30

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Solution

The fourth proportional to 72,229.43, 99,676.04 and 40,398.30 is: 55,749.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,229.43 : 99,676.04 = 40,398.30 : x
  2. Step 2: Convert to fraction form
    72,229.43/99,676.04 = 40,398.30/x
  3. Step 3: Cross multiply
    72,229.43x = 99,676.04 × 40,398.30
  4. Step 4: Simplify right side
    72,229.43x = 4,026,742,364.74
  5. Step 5: Solve for x
    x = 4,026,742,364.74/72,229.43
  6. Step 6: Final answer
    x = 55,749.33

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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.