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Finding the Fourth Proportional to 71,241.50, 98,310.30 and 39,408.38

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Solution

The fourth proportional to 71,241.50, 98,310.30 and 39,408.38 is: 54,381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,241.50 : 98,310.30 = 39,408.38 : x
  2. Step 2: Convert to fraction form
    71,241.50/98,310.30 = 39,408.38/x
  3. Step 3: Cross multiply
    71,241.50x = 98,310.30 × 39,408.38
  4. Step 4: Simplify right side
    71,241.50x = 3,874,249,660.31
  5. Step 5: Solve for x
    x = 3,874,249,660.31/71,241.50
  6. Step 6: Final answer
    x = 54,381.92

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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.