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Finding the Fourth Proportional to 71,382.21, 98,503.32 and 39,549.21

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Solution

The fourth proportional to 71,382.21, 98,503.32 and 39,549.21 is: 54,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,382.21 : 98,503.32 = 39,549.21 : x
  2. Step 2: Convert to fraction form
    71,382.21/98,503.32 = 39,549.21/x
  3. Step 3: Cross multiply
    71,382.21x = 98,503.32 × 39,549.21
  4. Step 4: Simplify right side
    71,382.21x = 3,895,728,488.38
  5. Step 5: Solve for x
    x = 3,895,728,488.38/71,382.21
  6. Step 6: Final answer
    x = 54,575.62

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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.