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Finding the Fourth Proportional to 159,615.40, 239,301.60 and 80,786.20

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Solution

The fourth proportional to 159,615.40, 239,301.60 and 80,786.20 is: 121,117.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.40 : 239,301.60 = 80,786.20 : x
  2. Step 2: Convert to fraction form
    159,615.40/239,301.60 = 80,786.20/x
  3. Step 3: Cross multiply
    159,615.40x = 239,301.60 × 80,786.20
  4. Step 4: Simplify right side
    159,615.40x = 19,332,266,917.92
  5. Step 5: Solve for x
    x = 19,332,266,917.92/159,615.40
  6. Step 6: Final answer
    x = 121,117.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.