Home / 142,202.81-196,223.09-78,536.81

Finding the Fourth Proportional to 142,202.81, 196,223.09 and 78,536.81

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Solution

The fourth proportional to 142,202.81, 196,223.09 and 78,536.81 is: 108,371.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,202.81 : 196,223.09 = 78,536.81 : x
  2. Step 2: Convert to fraction form
    142,202.81/196,223.09 = 78,536.81/x
  3. Step 3: Cross multiply
    142,202.81x = 196,223.09 × 78,536.81
  4. Step 4: Simplify right side
    142,202.81x = 15,410,734,163.14
  5. Step 5: Solve for x
    x = 15,410,734,163.14/142,202.81
  6. Step 6: Final answer
    x = 108,371.52

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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.