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Finding the Fourth Proportional to 139,800.83, 192,927.34 and 76,138.57

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Solution

The fourth proportional to 139,800.83, 192,927.34 and 76,138.57 is: 105,072.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,800.83 : 192,927.34 = 76,138.57 : x
  2. Step 2: Convert to fraction form
    139,800.83/192,927.34 = 76,138.57/x
  3. Step 3: Cross multiply
    139,800.83x = 192,927.34 × 76,138.57
  4. Step 4: Simplify right side
    139,800.83x = 14,689,211,689.56
  5. Step 5: Solve for x
    x = 14,689,211,689.56/139,800.83
  6. Step 6: Final answer
    x = 105,072.42

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1.5x scale

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.