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Finding the Fourth Proportional to 101,508.38, 139,988.48 and 87,163.33

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Solution

The fourth proportional to 101,508.38, 139,988.48 and 87,163.33 is: 120,205.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,508.38 : 139,988.48 = 87,163.33 : x
  2. Step 2: Convert to fraction form
    101,508.38/139,988.48 = 87,163.33/x
  3. Step 3: Cross multiply
    101,508.38x = 139,988.48 × 87,163.33
  4. Step 4: Simplify right side
    101,508.38x = 12,201,862,078.44
  5. Step 5: Solve for x
    x = 12,201,862,078.44/101,508.38
  6. Step 6: Final answer
    x = 120,205.47

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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.