Home / 149,098.81-205,756.84-81,115.77

Finding the Fourth Proportional to 149,098.81, 205,756.84 and 81,115.77

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Solution

The fourth proportional to 149,098.81, 205,756.84 and 81,115.77 is: 111,940.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,098.81 : 205,756.84 = 81,115.77 : x
  2. Step 2: Convert to fraction form
    149,098.81/205,756.84 = 81,115.77/x
  3. Step 3: Cross multiply
    149,098.81x = 205,756.84 × 81,115.77
  4. Step 4: Simplify right side
    149,098.81x = 16,690,123,480.58
  5. Step 5: Solve for x
    x = 16,690,123,480.58/149,098.81
  6. Step 6: Final answer
    x = 111,940.02

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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.