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Finding the Fourth Proportional to 139,856.52, 192,994.38 and 79,425.66

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Solution

The fourth proportional to 139,856.52, 192,994.38 and 79,425.66 is: 109,603.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,856.52 : 192,994.38 = 79,425.66 : x
  2. Step 2: Convert to fraction form
    139,856.52/192,994.38 = 79,425.66/x
  3. Step 3: Cross multiply
    139,856.52x = 192,994.38 × 79,425.66
  4. Step 4: Simplify right side
    139,856.52x = 15,328,706,007.79
  5. Step 5: Solve for x
    x = 15,328,706,007.79/139,856.52
  6. Step 6: Final answer
    x = 109,603.08

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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.