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Finding the Fourth Proportional to 43,945.20, 65,901.60 and 21,751.20

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Solution

The fourth proportional to 43,945.20, 65,901.60 and 21,751.20 is: 32,618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,945.20 : 65,901.60 = 21,751.20 : x
  2. Step 2: Convert to fraction form
    43,945.20/65,901.60 = 21,751.20/x
  3. Step 3: Cross multiply
    43,945.20x = 65,901.60 × 21,751.20
  4. Step 4: Simplify right side
    43,945.20x = 1,433,438,881.92
  5. Step 5: Solve for x
    x = 1,433,438,881.92/43,945.20
  6. Step 6: Final answer
    x = 32,618.78

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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.