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Finding the Fourth Proportional to 72,302.33, 108,469.36 and 21,699.20

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Solution

The fourth proportional to 72,302.33, 108,469.36 and 21,699.20 is: 32,553.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,302.33 : 108,469.36 = 21,699.20 : x
  2. Step 2: Convert to fraction form
    72,302.33/108,469.36 = 21,699.20/x
  3. Step 3: Cross multiply
    72,302.33x = 108,469.36 × 21,699.20
  4. Step 4: Simplify right side
    72,302.33x = 2,353,698,336.51
  5. Step 5: Solve for x
    x = 2,353,698,336.51/72,302.33
  6. Step 6: Final answer
    x = 32,553.56

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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.