Home / 140,664-194,139.36-81,082.56

Finding the Fourth Proportional to 140,664, 194,139.36 and 81,082.56

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Solution

The fourth proportional to 140,664, 194,139.36 and 81,082.56 is: 111,907.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,664 : 194,139.36 = 81,082.56 : x
  2. Step 2: Convert to fraction form
    140,664/194,139.36 = 81,082.56/x
  3. Step 3: Cross multiply
    140,664x = 194,139.36 × 81,082.56
  4. Step 4: Simplify right side
    140,664x = 15,741,316,305.56
  5. Step 5: Solve for x
    x = 15,741,316,305.56/140,664
  6. Step 6: Final answer
    x = 111,907.21

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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.