Home / 142,110.22-196,111.70-78,447.56

Finding the Fourth Proportional to 142,110.22, 196,111.70 and 78,447.56

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Solution

The fourth proportional to 142,110.22, 196,111.70 and 78,447.56 is: 108,257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.22 : 196,111.70 = 78,447.56 : x
  2. Step 2: Convert to fraction form
    142,110.22/196,111.70 = 78,447.56/x
  3. Step 3: Cross multiply
    142,110.22x = 196,111.70 × 78,447.56
  4. Step 4: Simplify right side
    142,110.22x = 15,384,484,352.45
  5. Step 5: Solve for x
    x = 15,384,484,352.45/142,110.22
  6. Step 6: Final answer
    x = 108,257.41

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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.