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Finding the Fourth Proportional to 139,689.56, 192,771.60 and 76,027.82

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Solution

The fourth proportional to 139,689.56, 192,771.60 and 76,027.82 is: 104,918.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,689.56 : 192,771.60 = 76,027.82 : x
  2. Step 2: Convert to fraction form
    139,689.56/192,771.60 = 76,027.82/x
  3. Step 3: Cross multiply
    139,689.56x = 192,771.60 × 76,027.82
  4. Step 4: Simplify right side
    139,689.56x = 14,656,003,256.95
  5. Step 5: Solve for x
    x = 14,656,003,256.95/139,689.56
  6. Step 6: Final answer
    x = 104,918.38

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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.