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Finding the Fourth Proportional to 217,649.87, 300,356.82 and 122,156.57

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Solution

The fourth proportional to 217,649.87, 300,356.82 and 122,156.57 is: 168,576.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,649.87 : 300,356.82 = 122,156.57 : x
  2. Step 2: Convert to fraction form
    217,649.87/300,356.82 = 122,156.57/x
  3. Step 3: Cross multiply
    217,649.87x = 300,356.82 × 122,156.57
  4. Step 4: Simplify right side
    217,649.87x = 36,690,558,907.31
  5. Step 5: Solve for x
    x = 36,690,558,907.31/217,649.87
  6. Step 6: Final answer
    x = 168,576.07

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1.5x scale

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.