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Finding the Fourth Proportional to 139,722.91, 192,817.60 and 76,060.69

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Solution

The fourth proportional to 139,722.91, 192,817.60 and 76,060.69 is: 104,963.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,722.91 : 192,817.60 = 76,060.69 : x
  2. Step 2: Convert to fraction form
    139,722.91/192,817.60 = 76,060.69/x
  3. Step 3: Cross multiply
    139,722.91x = 192,817.60 × 76,060.69
  4. Step 4: Simplify right side
    139,722.91x = 14,665,839,027.95
  5. Step 5: Solve for x
    x = 14,665,839,027.95/139,722.91
  6. Step 6: Final answer
    x = 104,963.74

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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.