Home / 220,921.75-331,180.15-86,076.80

Finding the Fourth Proportional to 220,921.75, 331,180.15 and 86,076.80

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Solution

The fourth proportional to 220,921.75, 331,180.15 and 86,076.80 is: 129,036.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,921.75 : 331,180.15 = 86,076.80 : x
  2. Step 2: Convert to fraction form
    220,921.75/331,180.15 = 86,076.80/x
  3. Step 3: Cross multiply
    220,921.75x = 331,180.15 × 86,076.80
  4. Step 4: Simplify right side
    220,921.75x = 28,506,927,535.52
  5. Step 5: Solve for x
    x = 28,506,927,535.52/220,921.75
  6. Step 6: Final answer
    x = 129,036.31

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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.