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Finding the Fourth Proportional to 139,788.84, 192,905.06 and 80,169

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Solution

The fourth proportional to 139,788.84, 192,905.06 and 80,169 is: 110,631.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,788.84 : 192,905.06 = 80,169 : x
  2. Step 2: Convert to fraction form
    139,788.84/192,905.06 = 80,169/x
  3. Step 3: Cross multiply
    139,788.84x = 192,905.06 × 80,169
  4. Step 4: Simplify right side
    139,788.84x = 15,465,005,755.14
  5. Step 5: Solve for x
    x = 15,465,005,755.14/139,788.84
  6. Step 6: Final answer
    x = 110,631.19

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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.