Home / 213,081.75-319,666.05-86,720.85

Finding the Fourth Proportional to 213,081.75, 319,666.05 and 86,720.85

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Solution

The fourth proportional to 213,081.75, 319,666.05 and 86,720.85 is: 130,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,081.75 : 319,666.05 = 86,720.85 : x
  2. Step 2: Convert to fraction form
    213,081.75/319,666.05 = 86,720.85/x
  3. Step 3: Cross multiply
    213,081.75x = 319,666.05 × 86,720.85
  4. Step 4: Simplify right side
    213,081.75x = 27,721,711,572.14
  5. Step 5: Solve for x
    x = 27,721,711,572.14/213,081.75
  6. Step 6: Final answer
    x = 130,098.95

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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.