Home / 213,022.80-319,145.40-129,819.60

Finding the Fourth Proportional to 213,022.80, 319,145.40 and 129,819.60

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Solution

The fourth proportional to 213,022.80, 319,145.40 and 129,819.60 is: 194,492.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,022.80 : 319,145.40 = 129,819.60 : x
  2. Step 2: Convert to fraction form
    213,022.80/319,145.40 = 129,819.60/x
  3. Step 3: Cross multiply
    213,022.80x = 319,145.40 × 129,819.60
  4. Step 4: Simplify right side
    213,022.80x = 41,431,328,169.84
  5. Step 5: Solve for x
    x = 41,431,328,169.84/213,022.80
  6. Step 6: Final answer
    x = 194,492.46

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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.