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Finding the Fourth Proportional to 73,413, 101,309.94 and 39,879

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Solution

The fourth proportional to 73,413, 101,309.94 and 39,879 is: 55,033.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,413 : 101,309.94 = 39,879 : x
  2. Step 2: Convert to fraction form
    73,413/101,309.94 = 39,879/x
  3. Step 3: Cross multiply
    73,413x = 101,309.94 × 39,879
  4. Step 4: Simplify right side
    73,413x = 4,040,139,097.26
  5. Step 5: Solve for x
    x = 4,040,139,097.26/73,413
  6. Step 6: Final answer
    x = 55,033.02

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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.