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Finding the Fourth Proportional to 200,612.60, 276,719.50 and 129,085.56

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Solution

The fourth proportional to 200,612.60, 276,719.50 and 129,085.56 is: 178,057.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,612.60 : 276,719.50 = 129,085.56 : x
  2. Step 2: Convert to fraction form
    200,612.60/276,719.50 = 129,085.56/x
  3. Step 3: Cross multiply
    200,612.60x = 276,719.50 × 129,085.56
  4. Step 4: Simplify right side
    200,612.60x = 35,720,491,620.42
  5. Step 5: Solve for x
    x = 35,720,491,620.42/200,612.60
  6. Step 6: Final answer
    x = 178,057.07

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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.