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Finding the Fourth Proportional to 201,958.90, 302,938.35 and 68,989.30

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Solution

The fourth proportional to 201,958.90, 302,938.35 and 68,989.30 is: 103,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,958.90 : 302,938.35 = 68,989.30 : x
  2. Step 2: Convert to fraction form
    201,958.90/302,938.35 = 68,989.30/x
  3. Step 3: Cross multiply
    201,958.90x = 302,938.35 × 68,989.30
  4. Step 4: Simplify right side
    201,958.90x = 20,899,504,709.66
  5. Step 5: Solve for x
    x = 20,899,504,709.66/201,958.90
  6. Step 6: Final answer
    x = 103,483.95

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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.