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Finding the Fourth Proportional to 272,351.92, 408,528.06 and 85,378

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Solution

The fourth proportional to 272,351.92, 408,528.06 and 85,378 is: 128,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,351.92 : 408,528.06 = 85,378 : x
  2. Step 2: Convert to fraction form
    272,351.92/408,528.06 = 85,378/x
  3. Step 3: Cross multiply
    272,351.92x = 408,528.06 × 85,378
  4. Step 4: Simplify right side
    272,351.92x = 34,879,308,706.68
  5. Step 5: Solve for x
    x = 34,879,308,706.68/272,351.92
  6. Step 6: Final answer
    x = 128,067.06

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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.