Home / 139,755.77-192,864.35-80,128.25

Finding the Fourth Proportional to 139,755.77, 192,864.35 and 80,128.25

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Solution

The fourth proportional to 139,755.77, 192,864.35 and 80,128.25 is: 110,577.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,755.77 : 192,864.35 = 80,128.25 : x
  2. Step 2: Convert to fraction form
    139,755.77/192,864.35 = 80,128.25/x
  3. Step 3: Cross multiply
    139,755.77x = 192,864.35 × 80,128.25
  4. Step 4: Simplify right side
    139,755.77x = 15,453,882,452.25
  5. Step 5: Solve for x
    x = 15,453,882,452.25/139,755.77
  6. Step 6: Final answer
    x = 110,577.78

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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.