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Finding the Fourth Proportional to 72,606.54, 108,910.32 and 20,018.88

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Solution

The fourth proportional to 72,606.54, 108,910.32 and 20,018.88 is: 30,028.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,606.54 : 108,910.32 = 20,018.88 : x
  2. Step 2: Convert to fraction form
    72,606.54/108,910.32 = 20,018.88/x
  3. Step 3: Cross multiply
    72,606.54x = 108,910.32 × 20,018.88
  4. Step 4: Simplify right side
    72,606.54x = 2,180,262,626.84
  5. Step 5: Solve for x
    x = 2,180,262,626.84/72,606.54
  6. Step 6: Final answer
    x = 30,028.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.