Home / 212,570.55-318,872.30-86,150.61

Finding the Fourth Proportional to 212,570.55, 318,872.30 and 86,150.61

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Solution

The fourth proportional to 212,570.55, 318,872.30 and 86,150.61 is: 129,232.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,570.55 : 318,872.30 = 86,150.61 : x
  2. Step 2: Convert to fraction form
    212,570.55/318,872.30 = 86,150.61/x
  3. Step 3: Cross multiply
    212,570.55x = 318,872.30 × 86,150.61
  4. Step 4: Simplify right side
    212,570.55x = 27,471,042,726.35
  5. Step 5: Solve for x
    x = 27,471,042,726.35/212,570.55
  6. Step 6: Final answer
    x = 129,232.59

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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.