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Finding the Fourth Proportional to 139,324.15, 192,297.95 and 91,581.94

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Solution

The fourth proportional to 139,324.15, 192,297.95 and 91,581.94 is: 126,403.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,324.15 : 192,297.95 = 91,581.94 : x
  2. Step 2: Convert to fraction form
    139,324.15/192,297.95 = 91,581.94/x
  3. Step 3: Cross multiply
    139,324.15x = 192,297.95 × 91,581.94
  4. Step 4: Simplify right side
    139,324.15x = 17,611,019,319.02
  5. Step 5: Solve for x
    x = 17,611,019,319.02/139,324.15
  6. Step 6: Final answer
    x = 126,403.21

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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.