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Finding the Fourth Proportional to 185,640.04, 256,183.78 and 100,757

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Solution

The fourth proportional to 185,640.04, 256,183.78 and 100,757 is: 139,044.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,640.04 : 256,183.78 = 100,757 : x
  2. Step 2: Convert to fraction form
    185,640.04/256,183.78 = 100,757/x
  3. Step 3: Cross multiply
    185,640.04x = 256,183.78 × 100,757
  4. Step 4: Simplify right side
    185,640.04x = 25,812,309,121.46
  5. Step 5: Solve for x
    x = 25,812,309,121.46/185,640.04
  6. Step 6: Final answer
    x = 139,044.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.