Home / 212,904.09-319,356.20-86,613.05

Finding the Fourth Proportional to 212,904.09, 319,356.20 and 86,613.05

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Solution

The fourth proportional to 212,904.09, 319,356.20 and 86,613.05 is: 129,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,904.09 : 319,356.20 = 86,613.05 : x
  2. Step 2: Convert to fraction form
    212,904.09/319,356.20 = 86,613.05/x
  3. Step 3: Cross multiply
    212,904.09x = 319,356.20 × 86,613.05
  4. Step 4: Simplify right side
    212,904.09x = 27,660,412,488.56
  5. Step 5: Solve for x
    x = 27,660,412,488.56/212,904.09
  6. Step 6: Final answer
    x = 129,919.59

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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.