Home / 142,222.40-196,265.68-78,564.64

Finding the Fourth Proportional to 142,222.40, 196,265.68 and 78,564.64

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Solution

The fourth proportional to 142,222.40, 196,265.68 and 78,564.64 is: 108,418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,222.40 : 196,265.68 = 78,564.64 : x
  2. Step 2: Convert to fraction form
    142,222.40/196,265.68 = 78,564.64/x
  3. Step 3: Cross multiply
    142,222.40x = 196,265.68 × 78,564.64
  4. Step 4: Simplify right side
    142,222.40x = 15,419,542,493.56
  5. Step 5: Solve for x
    x = 15,419,542,493.56/142,222.40
  6. Step 6: Final answer
    x = 108,418.52

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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.