Home / 278,121.40-383,805.30-157,262.68

Finding the Fourth Proportional to 278,121.40, 383,805.30 and 157,262.68

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Solution

The fourth proportional to 278,121.40, 383,805.30 and 157,262.68 is: 217,021.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,121.40 : 383,805.30 = 157,262.68 : x
  2. Step 2: Convert to fraction form
    278,121.40/383,805.30 = 157,262.68/x
  3. Step 3: Cross multiply
    278,121.40x = 383,805.30 × 157,262.68
  4. Step 4: Simplify right side
    278,121.40x = 60,358,250,076.20
  5. Step 5: Solve for x
    x = 60,358,250,076.20/278,121.40
  6. Step 6: Final answer
    x = 217,021.24

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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.