Home / 278,136.72-383,836.21-157,296.07

Finding the Fourth Proportional to 278,136.72, 383,836.21 and 157,296.07

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Solution

The fourth proportional to 278,136.72, 383,836.21 and 157,296.07 is: 217,072.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,136.72 : 383,836.21 = 157,296.07 : x
  2. Step 2: Convert to fraction form
    278,136.72/383,836.21 = 157,296.07/x
  3. Step 3: Cross multiply
    278,136.72x = 383,836.21 × 157,296.07
  4. Step 4: Simplify right side
    278,136.72x = 60,375,927,356.69
  5. Step 5: Solve for x
    x = 60,375,927,356.69/278,136.72
  6. Step 6: Final answer
    x = 217,072.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.