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Finding the Fourth Proportional to 72,628.97, 108,949.73 and 20,038.46

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Solution

The fourth proportional to 72,628.97, 108,949.73 and 20,038.46 is: 30,059.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,628.97 : 108,949.73 = 20,038.46 : x
  2. Step 2: Convert to fraction form
    72,628.97/108,949.73 = 20,038.46/x
  3. Step 3: Cross multiply
    72,628.97x = 108,949.73 × 20,038.46
  4. Step 4: Simplify right side
    72,628.97x = 2,183,184,161.67
  5. Step 5: Solve for x
    x = 2,183,184,161.67/72,628.97
  6. Step 6: Final answer
    x = 30,059.41

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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.