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Finding the Fourth Proportional to 139,234.52, 192,138.49 and 75,570.95

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Solution

The fourth proportional to 139,234.52, 192,138.49 and 75,570.95 is: 104,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,234.52 : 192,138.49 = 75,570.95 : x
  2. Step 2: Convert to fraction form
    139,234.52/192,138.49 = 75,570.95/x
  3. Step 3: Cross multiply
    139,234.52x = 192,138.49 × 75,570.95
  4. Step 4: Simplify right side
    139,234.52x = 14,520,088,220.87
  5. Step 5: Solve for x
    x = 14,520,088,220.87/139,234.52
  6. Step 6: Final answer
    x = 104,285.12

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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.