Home / 139,201.50-192,098.07-78,770.91

Finding the Fourth Proportional to 139,201.50, 192,098.07 and 78,770.91

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Solution

The fourth proportional to 139,201.50, 192,098.07 and 78,770.91 is: 108,703.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,201.50 : 192,098.07 = 78,770.91 : x
  2. Step 2: Convert to fraction form
    139,201.50/192,098.07 = 78,770.91/x
  3. Step 3: Cross multiply
    139,201.50x = 192,098.07 × 78,770.91
  4. Step 4: Simplify right side
    139,201.50x = 15,131,739,783.14
  5. Step 5: Solve for x
    x = 15,131,739,783.14/139,201.50
  6. Step 6: Final answer
    x = 108,703.86

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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.