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Finding the Fourth Proportional to 138,759.94, 208,139.92 and 33,578.92

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Solution

The fourth proportional to 138,759.94, 208,139.92 and 33,578.92 is: 50,368.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,759.94 : 208,139.92 = 33,578.92 : x
  2. Step 2: Convert to fraction form
    138,759.94/208,139.92 = 33,578.92/x
  3. Step 3: Cross multiply
    138,759.94x = 208,139.92 × 33,578.92
  4. Step 4: Simplify right side
    138,759.94x = 6,989,113,722.49
  5. Step 5: Solve for x
    x = 6,989,113,722.49/138,759.94
  6. Step 6: Final answer
    x = 50,368.38

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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.