Home / 142,833.82-197,112.65-78,309.12

Finding the Fourth Proportional to 142,833.82, 197,112.65 and 78,309.12

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Solution

The fourth proportional to 142,833.82, 197,112.65 and 78,309.12 is: 108,067.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,833.82 : 197,112.65 = 78,309.12 : x
  2. Step 2: Convert to fraction form
    142,833.82/197,112.65 = 78,309.12/x
  3. Step 3: Cross multiply
    142,833.82x = 197,112.65 × 78,309.12
  4. Step 4: Simplify right side
    142,833.82x = 15,435,718,162.37
  5. Step 5: Solve for x
    x = 15,435,718,162.37/142,833.82
  6. Step 6: Final answer
    x = 108,067.67

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1.5x scale

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.