Home / 120,986.28-181,478.80-31,028.58

Finding the Fourth Proportional to 120,986.28, 181,478.80 and 31,028.58

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Solution

The fourth proportional to 120,986.28, 181,478.80 and 31,028.58 is: 46,542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,986.28 : 181,478.80 = 31,028.58 : x
  2. Step 2: Convert to fraction form
    120,986.28/181,478.80 = 31,028.58/x
  3. Step 3: Cross multiply
    120,986.28x = 181,478.80 × 31,028.58
  4. Step 4: Simplify right side
    120,986.28x = 5,631,029,464.10
  5. Step 5: Solve for x
    x = 5,631,029,464.10/120,986.28
  6. Step 6: Final answer
    x = 46,542.71

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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.