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Finding the Fourth Proportional to 139,371.28, 192,412.14 and 91,763

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Solution

The fourth proportional to 139,371.28, 192,412.14 and 91,763 is: 126,685.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,371.28 : 192,412.14 = 91,763 : x
  2. Step 2: Convert to fraction form
    139,371.28/192,412.14 = 91,763/x
  3. Step 3: Cross multiply
    139,371.28x = 192,412.14 × 91,763
  4. Step 4: Simplify right side
    139,371.28x = 17,656,315,202.82
  5. Step 5: Solve for x
    x = 17,656,315,202.82/139,371.28
  6. Step 6: Final answer
    x = 126,685.46

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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.