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Finding the Fourth Proportional to 139,718.63, 192,811.73 and 76,056.90

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Solution

The fourth proportional to 139,718.63, 192,811.73 and 76,056.90 is: 104,958.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.63 : 192,811.73 = 76,056.90 : x
  2. Step 2: Convert to fraction form
    139,718.63/192,811.73 = 76,056.90/x
  3. Step 3: Cross multiply
    139,718.63x = 192,811.73 × 76,056.90
  4. Step 4: Simplify right side
    139,718.63x = 14,664,662,087.15
  5. Step 5: Solve for x
    x = 14,664,662,087.15/139,718.63
  6. Step 6: Final answer
    x = 104,958.53

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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.