Home / 136,977.20-205,120.20-89,975.60

Finding the Fourth Proportional to 136,977.20, 205,120.20 and 89,975.60

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Solution

The fourth proportional to 136,977.20, 205,120.20 and 89,975.60 is: 134,736.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,977.20 : 205,120.20 = 89,975.60 : x
  2. Step 2: Convert to fraction form
    136,977.20/205,120.20 = 89,975.60/x
  3. Step 3: Cross multiply
    136,977.20x = 205,120.20 × 89,975.60
  4. Step 4: Simplify right side
    136,977.20x = 18,455,813,067.12
  5. Step 5: Solve for x
    x = 18,455,813,067.12/136,977.20
  6. Step 6: Final answer
    x = 134,736.39

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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.