Home / 255,983.97-383,961.60-78,490.49

Finding the Fourth Proportional to 255,983.97, 383,961.60 and 78,490.49

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Solution

The fourth proportional to 255,983.97, 383,961.60 and 78,490.49 is: 117,731.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,983.97 : 383,961.60 = 78,490.49 : x
  2. Step 2: Convert to fraction form
    255,983.97/383,961.60 = 78,490.49/x
  3. Step 3: Cross multiply
    255,983.97x = 383,961.60 × 78,490.49
  4. Step 4: Simplify right side
    255,983.97x = 30,137,335,085.09
  5. Step 5: Solve for x
    x = 30,137,335,085.09/255,983.97
  6. Step 6: Final answer
    x = 117,731.34

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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.