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Finding the Fourth Proportional to 319,537.62, 479,186.81 and 137,145.39

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Solution

The fourth proportional to 319,537.62, 479,186.81 and 137,145.39 is: 205,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,537.62 : 479,186.81 = 137,145.39 : x
  2. Step 2: Convert to fraction form
    319,537.62/479,186.81 = 137,145.39/x
  3. Step 3: Cross multiply
    319,537.62x = 479,186.81 × 137,145.39
  4. Step 4: Simplify right side
    319,537.62x = 65,718,263,481.14
  5. Step 5: Solve for x
    x = 65,718,263,481.14/319,537.62
  6. Step 6: Final answer
    x = 205,666.75

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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.