Home / 120,580.41-180,947.57-85,019.79

Finding the Fourth Proportional to 120,580.41, 180,947.57 and 85,019.79

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Solution

The fourth proportional to 120,580.41, 180,947.57 and 85,019.79 is: 127,583.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,580.41 : 180,947.57 = 85,019.79 : x
  2. Step 2: Convert to fraction form
    120,580.41/180,947.57 = 85,019.79/x
  3. Step 3: Cross multiply
    120,580.41x = 180,947.57 × 85,019.79
  4. Step 4: Simplify right side
    120,580.41x = 15,384,123,977.31
  5. Step 5: Solve for x
    x = 15,384,123,977.31/120,580.41
  6. Step 6: Final answer
    x = 127,583.94

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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.