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Finding the Fourth Proportional to 339,455.44, 509,183.08 and 86,736.40

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Solution

The fourth proportional to 339,455.44, 509,183.08 and 86,736.40 is: 130,104.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,455.44 : 509,183.08 = 86,736.40 : x
  2. Step 2: Convert to fraction form
    339,455.44/509,183.08 = 86,736.40/x
  3. Step 3: Cross multiply
    339,455.44x = 509,183.08 × 86,736.40
  4. Step 4: Simplify right side
    339,455.44x = 44,164,707,300.11
  5. Step 5: Solve for x
    x = 44,164,707,300.11/339,455.44
  6. Step 6: Final answer
    x = 130,104.58

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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.