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Finding the Fourth Proportional to 139,486.29, 192,487.03 and 79,062.50

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Solution

The fourth proportional to 139,486.29, 192,487.03 and 79,062.50 is: 109,103.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.29 : 192,487.03 = 79,062.50 : x
  2. Step 2: Convert to fraction form
    139,486.29/192,487.03 = 79,062.50/x
  3. Step 3: Cross multiply
    139,486.29x = 192,487.03 × 79,062.50
  4. Step 4: Simplify right side
    139,486.29x = 15,218,504,649.28
  5. Step 5: Solve for x
    x = 15,218,504,649.28/139,486.29
  6. Step 6: Final answer
    x = 109,103.95

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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.