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Finding the Fourth Proportional to 201,322.90, 302,022.42 and 66,394.72

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Solution

The fourth proportional to 201,322.90, 302,022.42 and 66,394.72 is: 99,604.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,322.90 : 302,022.42 = 66,394.72 : x
  2. Step 2: Convert to fraction form
    201,322.90/302,022.42 = 66,394.72/x
  3. Step 3: Cross multiply
    201,322.90x = 302,022.42 × 66,394.72
  4. Step 4: Simplify right side
    201,322.90x = 20,052,694,009.62
  5. Step 5: Solve for x
    x = 20,052,694,009.62/201,322.90
  6. Step 6: Final answer
    x = 99,604.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.