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Finding the Fourth Proportional to 139,700.94, 192,787.11 and 76,038.54

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Solution

The fourth proportional to 139,700.94, 192,787.11 and 76,038.54 is: 104,933.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,700.94 : 192,787.11 = 76,038.54 : x
  2. Step 2: Convert to fraction form
    139,700.94/192,787.11 = 76,038.54/x
  3. Step 3: Cross multiply
    139,700.94x = 192,787.11 × 76,038.54
  4. Step 4: Simplify right side
    139,700.94x = 14,659,250,375.22
  5. Step 5: Solve for x
    x = 14,659,250,375.22/139,700.94
  6. Step 6: Final answer
    x = 104,933.08

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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.