Home / 142,581.21-196,782.80-82,140.09

Finding the Fourth Proportional to 142,581.21, 196,782.80 and 82,140.09

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Solution

The fourth proportional to 142,581.21, 196,782.80 and 82,140.09 is: 113,365.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,581.21 : 196,782.80 = 82,140.09 : x
  2. Step 2: Convert to fraction form
    142,581.21/196,782.80 = 82,140.09/x
  3. Step 3: Cross multiply
    142,581.21x = 196,782.80 × 82,140.09
  4. Step 4: Simplify right side
    142,581.21x = 16,163,756,491.75
  5. Step 5: Solve for x
    x = 16,163,756,491.75/142,581.21
  6. Step 6: Final answer
    x = 113,365.26

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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.