Home / 81,198.38-121,794.84-28,606.50

Finding the Fourth Proportional to 81,198.38, 121,794.84 and 28,606.50

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Solution

The fourth proportional to 81,198.38, 121,794.84 and 28,606.50 is: 42,908.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,198.38 : 121,794.84 = 28,606.50 : x
  2. Step 2: Convert to fraction form
    81,198.38/121,794.84 = 28,606.50/x
  3. Step 3: Cross multiply
    81,198.38x = 121,794.84 × 28,606.50
  4. Step 4: Simplify right side
    81,198.38x = 3,484,124,090.46
  5. Step 5: Solve for x
    x = 3,484,124,090.46/81,198.38
  6. Step 6: Final answer
    x = 42,908.79

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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.