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Finding the Fourth Proportional to 72,654.40, 108,999.60 and 33,203.20

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Solution

The fourth proportional to 72,654.40, 108,999.60 and 33,203.20 is: 49,813.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,654.40 : 108,999.60 = 33,203.20 : x
  2. Step 2: Convert to fraction form
    72,654.40/108,999.60 = 33,203.20/x
  3. Step 3: Cross multiply
    72,654.40x = 108,999.60 × 33,203.20
  4. Step 4: Simplify right side
    72,654.40x = 3,619,135,518.72
  5. Step 5: Solve for x
    x = 3,619,135,518.72/72,654.40
  6. Step 6: Final answer
    x = 49,813.03

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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.