Home / 77,081.15-115,629.42-20,922.17

Finding the Fourth Proportional to 77,081.15, 115,629.42 and 20,922.17

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Solution

The fourth proportional to 77,081.15, 115,629.42 and 20,922.17 is: 31,385.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,081.15 : 115,629.42 = 20,922.17 : x
  2. Step 2: Convert to fraction form
    77,081.15/115,629.42 = 20,922.17/x
  3. Step 3: Cross multiply
    77,081.15x = 115,629.42 × 20,922.17
  4. Step 4: Simplify right side
    77,081.15x = 2,419,217,804.09
  5. Step 5: Solve for x
    x = 2,419,217,804.09/77,081.15
  6. Step 6: Final answer
    x = 31,385.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.