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Finding the Fourth Proportional to 139,325.76, 192,270.96 and 75,664.80

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Solution

The fourth proportional to 139,325.76, 192,270.96 and 75,664.80 is: 104,418.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,325.76 : 192,270.96 = 75,664.80 : x
  2. Step 2: Convert to fraction form
    139,325.76/192,270.96 = 75,664.80/x
  3. Step 3: Cross multiply
    139,325.76x = 192,270.96 × 75,664.80
  4. Step 4: Simplify right side
    139,325.76x = 14,548,143,734.21
  5. Step 5: Solve for x
    x = 14,548,143,734.21/139,325.76
  6. Step 6: Final answer
    x = 104,418.19

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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.