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Finding the Fourth Proportional to 272,377.42, 408,631.73 and 85,388.92

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Solution

The fourth proportional to 272,377.42, 408,631.73 and 85,388.92 is: 128,103.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,377.42 : 408,631.73 = 85,388.92 : x
  2. Step 2: Convert to fraction form
    272,377.42/408,631.73 = 85,388.92/x
  3. Step 3: Cross multiply
    272,377.42x = 408,631.73 × 85,388.92
  4. Step 4: Simplify right side
    272,377.42x = 34,892,620,653.91
  5. Step 5: Solve for x
    x = 34,892,620,653.91/272,377.42
  6. Step 6: Final answer
    x = 128,103.94

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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.