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Finding the Fourth Proportional to 139,486.42, 192,487.20 and 79,062.62

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Solution

The fourth proportional to 139,486.42, 192,487.20 and 79,062.62 is: 109,104.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.42 : 192,487.20 = 79,062.62 : x
  2. Step 2: Convert to fraction form
    139,486.42/192,487.20 = 79,062.62/x
  3. Step 3: Cross multiply
    139,486.42x = 192,487.20 × 79,062.62
  4. Step 4: Simplify right side
    139,486.42x = 15,218,542,348.46
  5. Step 5: Solve for x
    x = 15,218,542,348.46/139,486.42
  6. Step 6: Final answer
    x = 109,104.12

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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.