Home / 142,379.70-196,487.94-78,721.59

Finding the Fourth Proportional to 142,379.70, 196,487.94 and 78,721.59

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Solution

The fourth proportional to 142,379.70, 196,487.94 and 78,721.59 is: 108,637.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,379.70 : 196,487.94 = 78,721.59 : x
  2. Step 2: Convert to fraction form
    142,379.70/196,487.94 = 78,721.59/x
  3. Step 3: Cross multiply
    142,379.70x = 196,487.94 × 78,721.59
  4. Step 4: Simplify right side
    142,379.70x = 15,467,843,052.62
  5. Step 5: Solve for x
    x = 15,467,843,052.62/142,379.70
  6. Step 6: Final answer
    x = 108,637.98

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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.