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Finding the Fourth Proportional to 115,654.72, 159,601.44 and 65,352.64

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Solution

The fourth proportional to 115,654.72, 159,601.44 and 65,352.64 is: 90,185.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,654.72 : 159,601.44 = 65,352.64 : x
  2. Step 2: Convert to fraction form
    115,654.72/159,601.44 = 65,352.64/x
  3. Step 3: Cross multiply
    115,654.72x = 159,601.44 × 65,352.64
  4. Step 4: Simplify right side
    115,654.72x = 10,430,375,451.80
  5. Step 5: Solve for x
    x = 10,430,375,451.80/115,654.72
  6. Step 6: Final answer
    x = 90,185.47

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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.