Home / 139,837.39-192,961.21-78,573.85

Finding the Fourth Proportional to 139,837.39, 192,961.21 and 78,573.85

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Solution

The fourth proportional to 139,837.39, 192,961.21 and 78,573.85 is: 108,423.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,837.39 : 192,961.21 = 78,573.85 : x
  2. Step 2: Convert to fraction form
    139,837.39/192,961.21 = 78,573.85/x
  3. Step 3: Cross multiply
    139,837.39x = 192,961.21 × 78,573.85
  4. Step 4: Simplify right side
    139,837.39x = 15,161,703,812.68
  5. Step 5: Solve for x
    x = 15,161,703,812.68/139,837.39
  6. Step 6: Final answer
    x = 108,423.82

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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.