Home / 142,338.60-196,422.03-81,918.54

Finding the Fourth Proportional to 142,338.60, 196,422.03 and 81,918.54

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Solution

The fourth proportional to 142,338.60, 196,422.03 and 81,918.54 is: 113,044.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,338.60 : 196,422.03 = 81,918.54 : x
  2. Step 2: Convert to fraction form
    142,338.60/196,422.03 = 81,918.54/x
  3. Step 3: Cross multiply
    142,338.60x = 196,422.03 × 81,918.54
  4. Step 4: Simplify right side
    142,338.60x = 16,090,605,921.44
  5. Step 5: Solve for x
    x = 16,090,605,921.44/142,338.60
  6. Step 6: Final answer
    x = 113,044.57

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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.