Home / 80,921.46-121,399.72-31,001.56

Finding the Fourth Proportional to 80,921.46, 121,399.72 and 31,001.56

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Solution

The fourth proportional to 80,921.46, 121,399.72 and 31,001.56 is: 46,509.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921.46 : 121,399.72 = 31,001.56 : x
  2. Step 2: Convert to fraction form
    80,921.46/121,399.72 = 31,001.56/x
  3. Step 3: Cross multiply
    80,921.46x = 121,399.72 × 31,001.56
  4. Step 4: Simplify right side
    80,921.46x = 3,763,580,791.12
  5. Step 5: Solve for x
    x = 3,763,580,791.12/80,921.46
  6. Step 6: Final answer
    x = 46,509.06

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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.