Home / 142,379.37-196,487.64-78,721.29

Finding the Fourth Proportional to 142,379.37, 196,487.64 and 78,721.29

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Solution

The fourth proportional to 142,379.37, 196,487.64 and 78,721.29 is: 108,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,379.37 : 196,487.64 = 78,721.29 : x
  2. Step 2: Convert to fraction form
    142,379.37/196,487.64 = 78,721.29/x
  3. Step 3: Cross multiply
    142,379.37x = 196,487.64 × 78,721.29
  4. Step 4: Simplify right side
    142,379.37x = 15,467,760,489.86
  5. Step 5: Solve for x
    x = 15,467,760,489.86/142,379.37
  6. Step 6: Final answer
    x = 108,637.65

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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.