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Finding the Fourth Proportional to 201,908.40, 302,862.60 and 68,938.80

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Solution

The fourth proportional to 201,908.40, 302,862.60 and 68,938.80 is: 103,408.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,908.40 : 302,862.60 = 68,938.80 : x
  2. Step 2: Convert to fraction form
    201,908.40/302,862.60 = 68,938.80/x
  3. Step 3: Cross multiply
    201,908.40x = 302,862.60 × 68,938.80
  4. Step 4: Simplify right side
    201,908.40x = 20,878,984,208.88
  5. Step 5: Solve for x
    x = 20,878,984,208.88/201,908.40
  6. Step 6: Final answer
    x = 103,408.20

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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.