Home / 212,724.28-319,141.77-79,615

Finding the Fourth Proportional to 212,724.28, 319,141.77 and 79,615

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Solution

The fourth proportional to 212,724.28, 319,141.77 and 79,615 is: 119,443.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,724.28 : 319,141.77 = 79,615 : x
  2. Step 2: Convert to fraction form
    212,724.28/319,141.77 = 79,615/x
  3. Step 3: Cross multiply
    212,724.28x = 319,141.77 × 79,615
  4. Step 4: Simplify right side
    212,724.28x = 25,408,472,018.55
  5. Step 5: Solve for x
    x = 25,408,472,018.55/212,724.28
  6. Step 6: Final answer
    x = 119,443.22

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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.