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Finding the Fourth Proportional to 165,804.70, 248,793.45 and 72,319.90

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Solution

The fourth proportional to 165,804.70, 248,793.45 and 72,319.90 is: 108,517.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,804.70 : 248,793.45 = 72,319.90 : x
  2. Step 2: Convert to fraction form
    165,804.70/248,793.45 = 72,319.90/x
  3. Step 3: Cross multiply
    165,804.70x = 248,793.45 × 72,319.90
  4. Step 4: Simplify right side
    165,804.70x = 17,992,717,424.66
  5. Step 5: Solve for x
    x = 17,992,717,424.66/165,804.70
  6. Step 6: Final answer
    x = 108,517.54

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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.