Home / 137,583.78-189,867.65-80,221.56

Finding the Fourth Proportional to 137,583.78, 189,867.65 and 80,221.56

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Solution

The fourth proportional to 137,583.78, 189,867.65 and 80,221.56 is: 110,706.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,583.78 : 189,867.65 = 80,221.56 : x
  2. Step 2: Convert to fraction form
    137,583.78/189,867.65 = 80,221.56/x
  3. Step 3: Cross multiply
    137,583.78x = 189,867.65 × 80,221.56
  4. Step 4: Simplify right side
    137,583.78x = 15,231,479,076.53
  5. Step 5: Solve for x
    x = 15,231,479,076.53/137,583.78
  6. Step 6: Final answer
    x = 110,706.94

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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.