Home / 142,134.62-196,145.21-78,471.95

Finding the Fourth Proportional to 142,134.62, 196,145.21 and 78,471.95

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Solution

The fourth proportional to 142,134.62, 196,145.21 and 78,471.95 is: 108,290.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,134.62 : 196,145.21 = 78,471.95 : x
  2. Step 2: Convert to fraction form
    142,134.62/196,145.21 = 78,471.95/x
  3. Step 3: Cross multiply
    142,134.62x = 196,145.21 × 78,471.95
  4. Step 4: Simplify right side
    142,134.62x = 15,391,895,738.77
  5. Step 5: Solve for x
    x = 15,391,895,738.77/142,134.62
  6. Step 6: Final answer
    x = 108,290.97

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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.