Home / 142,197.32-196,231.10-78,533.75

Finding the Fourth Proportional to 142,197.32, 196,231.10 and 78,533.75

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Solution

The fourth proportional to 142,197.32, 196,231.10 and 78,533.75 is: 108,375.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,197.32 : 196,231.10 = 78,533.75 : x
  2. Step 2: Convert to fraction form
    142,197.32/196,231.10 = 78,533.75/x
  3. Step 3: Cross multiply
    142,197.32x = 196,231.10 × 78,533.75
  4. Step 4: Simplify right side
    142,197.32x = 15,410,764,149.63
  5. Step 5: Solve for x
    x = 15,410,764,149.63/142,197.32
  6. Step 6: Final answer
    x = 108,375.91

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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.