Home / 151,286.40-208,757.12-87,615.36

Finding the Fourth Proportional to 151,286.40, 208,757.12 and 87,615.36

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Solution

The fourth proportional to 151,286.40, 208,757.12 and 87,615.36 is: 120,898.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,286.40 : 208,757.12 = 87,615.36 : x
  2. Step 2: Convert to fraction form
    151,286.40/208,757.12 = 87,615.36/x
  3. Step 3: Cross multiply
    151,286.40x = 208,757.12 × 87,615.36
  4. Step 4: Simplify right side
    151,286.40x = 18,290,330,221.36
  5. Step 5: Solve for x
    x = 18,290,330,221.36/151,286.40
  6. Step 6: Final answer
    x = 120,898.71

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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.