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Finding the Fourth Proportional to 324,456.72, 486,686.16 and 99,815.64

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Solution

The fourth proportional to 324,456.72, 486,686.16 and 99,815.64 is: 149,723.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,456.72 : 486,686.16 = 99,815.64 : x
  2. Step 2: Convert to fraction form
    324,456.72/486,686.16 = 99,815.64/x
  3. Step 3: Cross multiply
    324,456.72x = 486,686.16 × 99,815.64
  4. Step 4: Simplify right side
    324,456.72x = 48,578,890,539.54
  5. Step 5: Solve for x
    x = 48,578,890,539.54/324,456.72
  6. Step 6: Final answer
    x = 149,723.79

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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.