Home / 212,915.59-319,373.43-86,624.56

Finding the Fourth Proportional to 212,915.59, 319,373.43 and 86,624.56

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Solution

The fourth proportional to 212,915.59, 319,373.43 and 86,624.56 is: 129,936.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,915.59 : 319,373.43 = 86,624.56 : x
  2. Step 2: Convert to fraction form
    212,915.59/319,373.43 = 86,624.56/x
  3. Step 3: Cross multiply
    212,915.59x = 319,373.43 × 86,624.56
  4. Step 4: Simplify right side
    212,915.59x = 27,665,582,849.44
  5. Step 5: Solve for x
    x = 27,665,582,849.44/212,915.59
  6. Step 6: Final answer
    x = 129,936.86

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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.