Home / 255,622.20-383,490.90-78,137.40

Finding the Fourth Proportional to 255,622.20, 383,490.90 and 78,137.40

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Solution

The fourth proportional to 255,622.20, 383,490.90 and 78,137.40 is: 117,223.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,622.20 : 383,490.90 = 78,137.40 : x
  2. Step 2: Convert to fraction form
    255,622.20/383,490.90 = 78,137.40/x
  3. Step 3: Cross multiply
    255,622.20x = 383,490.90 × 78,137.40
  4. Step 4: Simplify right side
    255,622.20x = 29,964,981,849.66
  5. Step 5: Solve for x
    x = 29,964,981,849.66/255,622.20
  6. Step 6: Final answer
    x = 117,223.71

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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.