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Finding the Fourth Proportional to 188,369.87, 259,799.81 and 123,905.21

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Solution

The fourth proportional to 188,369.87, 259,799.81 and 123,905.21 is: 170,890.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,369.87 : 259,799.81 = 123,905.21 : x
  2. Step 2: Convert to fraction form
    188,369.87/259,799.81 = 123,905.21/x
  3. Step 3: Cross multiply
    188,369.87x = 259,799.81 × 123,905.21
  4. Step 4: Simplify right side
    188,369.87x = 32,190,548,097.49
  5. Step 5: Solve for x
    x = 32,190,548,097.49/188,369.87
  6. Step 6: Final answer
    x = 170,890.12

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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.