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Finding the Fourth Proportional to 139,476.85, 192,471.72 and 79,043.96

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Solution

The fourth proportional to 139,476.85, 192,471.72 and 79,043.96 is: 109,077.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,476.85 : 192,471.72 = 79,043.96 : x
  2. Step 2: Convert to fraction form
    139,476.85/192,471.72 = 79,043.96/x
  3. Step 3: Cross multiply
    139,476.85x = 192,471.72 × 79,043.96
  4. Step 4: Simplify right side
    139,476.85x = 15,213,726,936.81
  5. Step 5: Solve for x
    x = 15,213,726,936.81/139,476.85
  6. Step 6: Final answer
    x = 109,077.08

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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.