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Finding the Fourth Proportional to 213,057.29, 319,502.88 and 79,864.88

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Solution

The fourth proportional to 213,057.29, 319,502.88 and 79,864.88 is: 119,766.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,057.29 : 319,502.88 = 79,864.88 : x
  2. Step 2: Convert to fraction form
    213,057.29/319,502.88 = 79,864.88/x
  3. Step 3: Cross multiply
    213,057.29x = 319,502.88 × 79,864.88
  4. Step 4: Simplify right side
    213,057.29x = 25,517,057,573.34
  5. Step 5: Solve for x
    x = 25,517,057,573.34/213,057.29
  6. Step 6: Final answer
    x = 119,766.18

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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.