Home / 142,868.82-197,148.20-78,327.75

Finding the Fourth Proportional to 142,868.82, 197,148.20 and 78,327.75

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Solution

The fourth proportional to 142,868.82, 197,148.20 and 78,327.75 is: 108,086.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,868.82 : 197,148.20 = 78,327.75 : x
  2. Step 2: Convert to fraction form
    142,868.82/197,148.20 = 78,327.75/x
  3. Step 3: Cross multiply
    142,868.82x = 197,148.20 × 78,327.75
  4. Step 4: Simplify right side
    142,868.82x = 15,442,174,530.91
  5. Step 5: Solve for x
    x = 15,442,174,530.91/142,868.82
  6. Step 6: Final answer
    x = 108,086.39

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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.