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Finding the Fourth Proportional to 272,086.62, 408,129.36 and 72,406.98

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Solution

The fourth proportional to 272,086.62, 408,129.36 and 72,406.98 is: 108,610.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,086.62 : 408,129.36 = 72,406.98 : x
  2. Step 2: Convert to fraction form
    272,086.62/408,129.36 = 72,406.98/x
  3. Step 3: Cross multiply
    272,086.62x = 408,129.36 × 72,406.98
  4. Step 4: Simplify right side
    272,086.62x = 29,551,414,406.93
  5. Step 5: Solve for x
    x = 29,551,414,406.93/272,086.62
  6. Step 6: Final answer
    x = 108,610.32

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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.