Home / 87,509.78-120,763.94-49,784.03

Finding the Fourth Proportional to 87,509.78, 120,763.94 and 49,784.03

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Solution

The fourth proportional to 87,509.78, 120,763.94 and 49,784.03 is: 68,702.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,509.78 : 120,763.94 = 49,784.03 : x
  2. Step 2: Convert to fraction form
    87,509.78/120,763.94 = 49,784.03/x
  3. Step 3: Cross multiply
    87,509.78x = 120,763.94 × 49,784.03
  4. Step 4: Simplify right side
    87,509.78x = 6,012,114,759.14
  5. Step 5: Solve for x
    x = 6,012,114,759.14/87,509.78
  6. Step 6: Final answer
    x = 68,702.21

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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.