Home / 84,155-126,233.46-21,821.72

Finding the Fourth Proportional to 84,155, 126,233.46 and 21,821.72

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Solution

The fourth proportional to 84,155, 126,233.46 and 21,821.72 is: 32,732.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,155 : 126,233.46 = 21,821.72 : x
  2. Step 2: Convert to fraction form
    84,155/126,233.46 = 21,821.72/x
  3. Step 3: Cross multiply
    84,155x = 126,233.46 × 21,821.72
  4. Step 4: Simplify right side
    84,155x = 2,754,631,218.75
  5. Step 5: Solve for x
    x = 2,754,631,218.75/84,155
  6. Step 6: Final answer
    x = 32,732.83

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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.