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Finding the Fourth Proportional to 123,491.87, 170,418.95 and 66,903.24

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Solution

The fourth proportional to 123,491.87, 170,418.95 and 66,903.24 is: 92,326.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,491.87 : 170,418.95 = 66,903.24 : x
  2. Step 2: Convert to fraction form
    123,491.87/170,418.95 = 66,903.24/x
  3. Step 3: Cross multiply
    123,491.87x = 170,418.95 × 66,903.24
  4. Step 4: Simplify right side
    123,491.87x = 11,401,579,912.40
  5. Step 5: Solve for x
    x = 11,401,579,912.40/123,491.87
  6. Step 6: Final answer
    x = 92,326.56

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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.