Home / 142,110.13-196,111.79-78,447.78

Finding the Fourth Proportional to 142,110.13, 196,111.79 and 78,447.78

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Solution

The fourth proportional to 142,110.13, 196,111.79 and 78,447.78 is: 108,257.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.13 : 196,111.79 = 78,447.78 : x
  2. Step 2: Convert to fraction form
    142,110.13/196,111.79 = 78,447.78/x
  3. Step 3: Cross multiply
    142,110.13x = 196,111.79 × 78,447.78
  4. Step 4: Simplify right side
    142,110.13x = 15,384,534,557.33
  5. Step 5: Solve for x
    x = 15,384,534,557.33/142,110.13
  6. Step 6: Final answer
    x = 108,257.83

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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.