Home / 77,643.31-116,470.53-20,716.92

Finding the Fourth Proportional to 77,643.31, 116,470.53 and 20,716.92

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Solution

The fourth proportional to 77,643.31, 116,470.53 and 20,716.92 is: 31,076.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,643.31 : 116,470.53 = 20,716.92 : x
  2. Step 2: Convert to fraction form
    77,643.31/116,470.53 = 20,716.92/x
  3. Step 3: Cross multiply
    77,643.31x = 116,470.53 × 20,716.92
  4. Step 4: Simplify right side
    77,643.31x = 2,412,910,558.57
  5. Step 5: Solve for x
    x = 2,412,910,558.57/77,643.31
  6. Step 6: Final answer
    x = 31,076.86

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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.