Home / 81,140.93-121,710.07-31,231.87

Finding the Fourth Proportional to 81,140.93, 121,710.07 and 31,231.87

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Solution

The fourth proportional to 81,140.93, 121,710.07 and 31,231.87 is: 46,847.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.93 : 121,710.07 = 31,231.87 : x
  2. Step 2: Convert to fraction form
    81,140.93/121,710.07 = 31,231.87/x
  3. Step 3: Cross multiply
    81,140.93x = 121,710.07 × 31,231.87
  4. Step 4: Simplify right side
    81,140.93x = 3,801,233,083.93
  5. Step 5: Solve for x
    x = 3,801,233,083.93/81,140.93
  6. Step 6: Final answer
    x = 46,847.29

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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.