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Finding the Fourth Proportional to 139,759.88, 192,858.88 and 79,331.76

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Solution

The fourth proportional to 139,759.88, 192,858.88 and 79,331.76 is: 109,472.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,759.88 : 192,858.88 = 79,331.76 : x
  2. Step 2: Convert to fraction form
    139,759.88/192,858.88 = 79,331.76/x
  3. Step 3: Cross multiply
    139,759.88x = 192,858.88 × 79,331.76
  4. Step 4: Simplify right side
    139,759.88x = 15,299,834,382.03
  5. Step 5: Solve for x
    x = 15,299,834,382.03/139,759.88
  6. Step 6: Final answer
    x = 109,472.29

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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.