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Finding the Fourth Proportional to 71,181.40, 98,226.11 and 39,348.40

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Solution

The fourth proportional to 71,181.40, 98,226.11 and 39,348.40 is: 54,298.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,181.40 : 98,226.11 = 39,348.40 : x
  2. Step 2: Convert to fraction form
    71,181.40/98,226.11 = 39,348.40/x
  3. Step 3: Cross multiply
    71,181.40x = 98,226.11 × 39,348.40
  4. Step 4: Simplify right side
    71,181.40x = 3,865,040,266.72
  5. Step 5: Solve for x
    x = 3,865,040,266.72/71,181.40
  6. Step 6: Final answer
    x = 54,298.46

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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.