Home / 212,823.84-319,020.30-137,991.36

Finding the Fourth Proportional to 212,823.84, 319,020.30 and 137,991.36

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Solution

The fourth proportional to 212,823.84, 319,020.30 and 137,991.36 is: 206,847.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,823.84 : 319,020.30 = 137,991.36 : x
  2. Step 2: Convert to fraction form
    212,823.84/319,020.30 = 137,991.36/x
  3. Step 3: Cross multiply
    212,823.84x = 319,020.30 × 137,991.36
  4. Step 4: Simplify right side
    212,823.84x = 44,022,045,064.61
  5. Step 5: Solve for x
    x = 44,022,045,064.61/212,823.84
  6. Step 6: Final answer
    x = 206,847.34

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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.