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Finding the Fourth Proportional to 199,759.68, 299,640.68 and 66,639.56

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Solution

The fourth proportional to 199,759.68, 299,640.68 and 66,639.56 is: 99,959.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,759.68 : 299,640.68 = 66,639.56 : x
  2. Step 2: Convert to fraction form
    199,759.68/299,640.68 = 66,639.56/x
  3. Step 3: Cross multiply
    199,759.68x = 299,640.68 × 66,639.56
  4. Step 4: Simplify right side
    199,759.68x = 19,967,923,073.30
  5. Step 5: Solve for x
    x = 19,967,923,073.30/199,759.68
  6. Step 6: Final answer
    x = 99,959.73

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1.5x scale

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.