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Finding the Fourth Proportional to 139,707.11, 192,790.46 and 79,274.15

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Solution

The fourth proportional to 139,707.11, 192,790.46 and 79,274.15 is: 109,395.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,707.11 : 192,790.46 = 79,274.15 : x
  2. Step 2: Convert to fraction form
    139,707.11/192,790.46 = 79,274.15/x
  3. Step 3: Cross multiply
    139,707.11x = 192,790.46 × 79,274.15
  4. Step 4: Simplify right side
    139,707.11x = 15,283,299,844.61
  5. Step 5: Solve for x
    x = 15,283,299,844.61/139,707.11
  6. Step 6: Final answer
    x = 109,395.29

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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.