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Finding the Fourth Proportional to 127,912.57, 192,035.71 and 85,980.49

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Solution

The fourth proportional to 127,912.57, 192,035.71 and 85,980.49 is: 129,082.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,912.57 : 192,035.71 = 85,980.49 : x
  2. Step 2: Convert to fraction form
    127,912.57/192,035.71 = 85,980.49/x
  3. Step 3: Cross multiply
    127,912.57x = 192,035.71 × 85,980.49
  4. Step 4: Simplify right side
    127,912.57x = 16,511,324,070.68
  5. Step 5: Solve for x
    x = 16,511,324,070.68/127,912.57
  6. Step 6: Final answer
    x = 129,082.89

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1.5x scale

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.