Home / 142,379.72-196,474.26-78,716.92

Finding the Fourth Proportional to 142,379.72, 196,474.26 and 78,716.92

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Solution

The fourth proportional to 142,379.72, 196,474.26 and 78,716.92 is: 108,623.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,379.72 : 196,474.26 = 78,716.92 : x
  2. Step 2: Convert to fraction form
    142,379.72/196,474.26 = 78,716.92/x
  3. Step 3: Cross multiply
    142,379.72x = 196,474.26 × 78,716.92
  4. Step 4: Simplify right side
    142,379.72x = 15,465,848,606.48
  5. Step 5: Solve for x
    x = 15,465,848,606.48/142,379.72
  6. Step 6: Final answer
    x = 108,623.96

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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.