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Finding the Fourth Proportional to 139,441.40, 192,428.59 and 79,023.56

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Solution

The fourth proportional to 139,441.40, 192,428.59 and 79,023.56 is: 109,052.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,441.40 : 192,428.59 = 79,023.56 : x
  2. Step 2: Convert to fraction form
    139,441.40/192,428.59 = 79,023.56/x
  3. Step 3: Cross multiply
    139,441.40x = 192,428.59 × 79,023.56
  4. Step 4: Simplify right side
    139,441.40x = 15,206,392,227.58
  5. Step 5: Solve for x
    x = 15,206,392,227.58/139,441.40
  6. Step 6: Final answer
    x = 109,052.21

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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.