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Finding the Fourth Proportional to 139,663.22, 192,733.37 and 76,000.87

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Solution

The fourth proportional to 139,663.22, 192,733.37 and 76,000.87 is: 104,880.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,663.22 : 192,733.37 = 76,000.87 : x
  2. Step 2: Convert to fraction form
    139,663.22/192,733.37 = 76,000.87/x
  3. Step 3: Cross multiply
    139,663.22x = 192,733.37 × 76,000.87
  4. Step 4: Simplify right side
    139,663.22x = 14,647,902,454.36
  5. Step 5: Solve for x
    x = 14,647,902,454.36/139,663.22
  6. Step 6: Final answer
    x = 104,880.17

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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.