Home / 142,780.36-196,974.06-85,388.08

Finding the Fourth Proportional to 142,780.36, 196,974.06 and 85,388.08

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Solution

The fourth proportional to 142,780.36, 196,974.06 and 85,388.08 is: 117,797.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,780.36 : 196,974.06 = 85,388.08 : x
  2. Step 2: Convert to fraction form
    142,780.36/196,974.06 = 85,388.08/x
  3. Step 3: Cross multiply
    142,780.36x = 196,974.06 × 85,388.08
  4. Step 4: Simplify right side
    142,780.36x = 16,819,236,793.20
  5. Step 5: Solve for x
    x = 16,819,236,793.20/142,780.36
  6. Step 6: Final answer
    x = 117,797.97

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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.