Home / 212,889.26-318,972.39-128,472.04

Finding the Fourth Proportional to 212,889.26, 318,972.39 and 128,472.04

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Solution

The fourth proportional to 212,889.26, 318,972.39 and 128,472.04 is: 192,489.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,889.26 : 318,972.39 = 128,472.04 : x
  2. Step 2: Convert to fraction form
    212,889.26/318,972.39 = 128,472.04/x
  3. Step 3: Cross multiply
    212,889.26x = 318,972.39 × 128,472.04
  4. Step 4: Simplify right side
    212,889.26x = 40,979,032,849.54
  5. Step 5: Solve for x
    x = 40,979,032,849.54/212,889.26
  6. Step 6: Final answer
    x = 192,489.91

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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.