Home / 213,220.96-319,713.78-86,828.80

Finding the Fourth Proportional to 213,220.96, 319,713.78 and 86,828.80

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Solution

The fourth proportional to 213,220.96, 319,713.78 and 86,828.80 is: 130,195.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,220.96 : 319,713.78 = 86,828.80 : x
  2. Step 2: Convert to fraction form
    213,220.96/319,713.78 = 86,828.80/x
  3. Step 3: Cross multiply
    213,220.96x = 319,713.78 × 86,828.80
  4. Step 4: Simplify right side
    213,220.96x = 27,760,363,860.86
  5. Step 5: Solve for x
    x = 27,760,363,860.86/213,220.96
  6. Step 6: Final answer
    x = 130,195.29

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1.5x scale

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.