Home / 142,400.40-196,512.61-81,144.84

Finding the Fourth Proportional to 142,400.40, 196,512.61 and 81,144.84

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Solution

The fourth proportional to 142,400.40, 196,512.61 and 81,144.84 is: 111,979.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,400.40 : 196,512.61 = 81,144.84 : x
  2. Step 2: Convert to fraction form
    142,400.40/196,512.61 = 81,144.84/x
  3. Step 3: Cross multiply
    142,400.40x = 196,512.61 × 81,144.84
  4. Step 4: Simplify right side
    142,400.40x = 15,945,984,295.56
  5. Step 5: Solve for x
    x = 15,945,984,295.56/142,400.40
  6. Step 6: Final answer
    x = 111,979.91

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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.