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Finding the Fourth Proportional to 139,816.56, 192,951.66 and 79,385.20

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Solution

The fourth proportional to 139,816.56, 192,951.66 and 79,385.20 is: 109,554.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,816.56 : 192,951.66 = 79,385.20 : x
  2. Step 2: Convert to fraction form
    139,816.56/192,951.66 = 79,385.20/x
  3. Step 3: Cross multiply
    139,816.56x = 192,951.66 × 79,385.20
  4. Step 4: Simplify right side
    139,816.56x = 15,317,506,119.43
  5. Step 5: Solve for x
    x = 15,317,506,119.43/139,816.56
  6. Step 6: Final answer
    x = 109,554.31

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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.