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Finding the Fourth Proportional to 272,369.08, 408,619.18 and 85,380.58

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Solution

The fourth proportional to 272,369.08, 408,619.18 and 85,380.58 is: 128,091.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,369.08 : 408,619.18 = 85,380.58 : x
  2. Step 2: Convert to fraction form
    272,369.08/408,619.18 = 85,380.58/x
  3. Step 3: Cross multiply
    272,369.08x = 408,619.18 × 85,380.58
  4. Step 4: Simplify right side
    272,369.08x = 34,888,143,205.02
  5. Step 5: Solve for x
    x = 34,888,143,205.02/272,369.08
  6. Step 6: Final answer
    x = 128,091.42

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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.