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Finding the Fourth Proportional to 139,504.52, 192,418.27 and 85,819.14

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Solution

The fourth proportional to 139,504.52, 192,418.27 and 85,819.14 is: 118,370.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,504.52 : 192,418.27 = 85,819.14 : x
  2. Step 2: Convert to fraction form
    139,504.52/192,418.27 = 85,819.14/x
  3. Step 3: Cross multiply
    139,504.52x = 192,418.27 × 85,819.14
  4. Step 4: Simplify right side
    139,504.52x = 16,513,170,237.14
  5. Step 5: Solve for x
    x = 16,513,170,237.14/139,504.52
  6. Step 6: Final answer
    x = 118,370.14

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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.