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Finding the Fourth Proportional to 139,439.40, 192,425.84 and 79,021.56

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Solution

The fourth proportional to 139,439.40, 192,425.84 and 79,021.56 is: 109,049.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,439.40 : 192,425.84 = 79,021.56 : x
  2. Step 2: Convert to fraction form
    139,439.40/192,425.84 = 79,021.56/x
  3. Step 3: Cross multiply
    139,439.40x = 192,425.84 × 79,021.56
  4. Step 4: Simplify right side
    139,439.40x = 15,205,789,666.00
  5. Step 5: Solve for x
    x = 15,205,789,666.00/139,439.40
  6. Step 6: Final answer
    x = 109,049.45

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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.