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Finding the Fourth Proportional to 323,975.47, 485,930.39 and 87,342.07

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Solution

The fourth proportional to 323,975.47, 485,930.39 and 87,342.07 is: 131,004.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,975.47 : 485,930.39 = 87,342.07 : x
  2. Step 2: Convert to fraction form
    323,975.47/485,930.39 = 87,342.07/x
  3. Step 3: Cross multiply
    323,975.47x = 485,930.39 × 87,342.07
  4. Step 4: Simplify right side
    323,975.47x = 42,442,164,705.33
  5. Step 5: Solve for x
    x = 42,442,164,705.33/323,975.47
  6. Step 6: Final answer
    x = 131,004.25

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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.