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Finding the Fourth Proportional to 272,616.57, 408,989.52 and 85,628.07

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Solution

The fourth proportional to 272,616.57, 408,989.52 and 85,628.07 is: 128,462.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,616.57 : 408,989.52 = 85,628.07 : x
  2. Step 2: Convert to fraction form
    272,616.57/408,989.52 = 85,628.07/x
  3. Step 3: Cross multiply
    272,616.57x = 408,989.52 × 85,628.07
  4. Step 4: Simplify right side
    272,616.57x = 35,020,983,247.83
  5. Step 5: Solve for x
    x = 35,020,983,247.83/272,616.57
  6. Step 6: Final answer
    x = 128,462.42

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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.