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Finding the Fourth Proportional to 139,503.96, 192,533.18 and 79,084.44

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Solution

The fourth proportional to 139,503.96, 192,533.18 and 79,084.44 is: 109,146.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,503.96 : 192,533.18 = 79,084.44 : x
  2. Step 2: Convert to fraction form
    139,503.96/192,533.18 = 79,084.44/x
  3. Step 3: Cross multiply
    139,503.96x = 192,533.18 × 79,084.44
  4. Step 4: Simplify right side
    139,503.96x = 15,226,378,721.72
  5. Step 5: Solve for x
    x = 15,226,378,721.72/139,503.96
  6. Step 6: Final answer
    x = 109,146.57

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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.