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Finding the Fourth Proportional to 139,395.39, 192,366.99 and 78,964.74

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Solution

The fourth proportional to 139,395.39, 192,366.99 and 78,964.74 is: 108,972.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,395.39 : 192,366.99 = 78,964.74 : x
  2. Step 2: Convert to fraction form
    139,395.39/192,366.99 = 78,964.74/x
  3. Step 3: Cross multiply
    139,395.39x = 192,366.99 × 78,964.74
  4. Step 4: Simplify right side
    139,395.39x = 15,190,208,671.60
  5. Step 5: Solve for x
    x = 15,190,208,671.60/139,395.39
  6. Step 6: Final answer
    x = 108,972.11

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.