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Finding the Fourth Proportional to 139,380.73, 192,344.34 and 75,718.98

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Solution

The fourth proportional to 139,380.73, 192,344.34 and 75,718.98 is: 104,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,380.73 : 192,344.34 = 75,718.98 : x
  2. Step 2: Convert to fraction form
    139,380.73/192,344.34 = 75,718.98/x
  3. Step 3: Cross multiply
    139,380.73x = 192,344.34 × 75,718.98
  4. Step 4: Simplify right side
    139,380.73x = 14,564,117,233.57
  5. Step 5: Solve for x
    x = 14,564,117,233.57/139,380.73
  6. Step 6: Final answer
    x = 104,491.61

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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.