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Finding the Fourth Proportional to 335,399.28, 503,098.92 and 86,081.28

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Solution

The fourth proportional to 335,399.28, 503,098.92 and 86,081.28 is: 129,121.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,399.28 : 503,098.92 = 86,081.28 : x
  2. Step 2: Convert to fraction form
    335,399.28/503,098.92 = 86,081.28/x
  3. Step 3: Cross multiply
    335,399.28x = 503,098.92 × 86,081.28
  4. Step 4: Simplify right side
    335,399.28x = 43,307,399,000.22
  5. Step 5: Solve for x
    x = 43,307,399,000.22/335,399.28
  6. Step 6: Final answer
    x = 129,121.92

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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.