Home / 212,979.80-319,080.90-129,776.60

Finding the Fourth Proportional to 212,979.80, 319,080.90 and 129,776.60

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Solution

The fourth proportional to 212,979.80, 319,080.90 and 129,776.60 is: 194,427.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,979.80 : 319,080.90 = 129,776.60 : x
  2. Step 2: Convert to fraction form
    212,979.80/319,080.90 = 129,776.60/x
  3. Step 3: Cross multiply
    212,979.80x = 319,080.90 × 129,776.60
  4. Step 4: Simplify right side
    212,979.80x = 41,409,234,326.94
  5. Step 5: Solve for x
    x = 41,409,234,326.94/212,979.80
  6. Step 6: Final answer
    x = 194,427.99

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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.