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Finding the Fourth Proportional to 272,618.82, 408,992.90 and 85,630.32

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Solution

The fourth proportional to 272,618.82, 408,992.90 and 85,630.32 is: 128,465.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,618.82 : 408,992.90 = 85,630.32 : x
  2. Step 2: Convert to fraction form
    272,618.82/408,992.90 = 85,630.32/x
  3. Step 3: Cross multiply
    272,618.82x = 408,992.90 × 85,630.32
  4. Step 4: Simplify right side
    272,618.82x = 35,022,192,904.73
  5. Step 5: Solve for x
    x = 35,022,192,904.73/272,618.82
  6. Step 6: Final answer
    x = 128,465.79

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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.