Home / 81,078.31-111,887.04-45,268.61

Finding the Fourth Proportional to 81,078.31, 111,887.04 and 45,268.61

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Solution

The fourth proportional to 81,078.31, 111,887.04 and 45,268.61 is: 62,470.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.31 : 111,887.04 = 45,268.61 : x
  2. Step 2: Convert to fraction form
    81,078.31/111,887.04 = 45,268.61/x
  3. Step 3: Cross multiply
    81,078.31x = 111,887.04 × 45,268.61
  4. Step 4: Simplify right side
    81,078.31x = 5,064,971,057.53
  5. Step 5: Solve for x
    x = 5,064,971,057.53/81,078.31
  6. Step 6: Final answer
    x = 62,470.11

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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.