Home / 139,131.09-192,000.92-78,700.44

Finding the Fourth Proportional to 139,131.09, 192,000.92 and 78,700.44

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Solution

The fourth proportional to 139,131.09, 192,000.92 and 78,700.44 is: 108,606.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,131.09 : 192,000.92 = 78,700.44 : x
  2. Step 2: Convert to fraction form
    139,131.09/192,000.92 = 78,700.44/x
  3. Step 3: Cross multiply
    139,131.09x = 192,000.92 × 78,700.44
  4. Step 4: Simplify right side
    139,131.09x = 15,110,556,884.40
  5. Step 5: Solve for x
    x = 15,110,556,884.40/139,131.09
  6. Step 6: Final answer
    x = 108,606.62

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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.