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Finding the Fourth Proportional to 65,396.73, 90,246.63 and 38,540.37

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Solution

The fourth proportional to 65,396.73, 90,246.63 and 38,540.37 is: 53,185.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,396.73 : 90,246.63 = 38,540.37 : x
  2. Step 2: Convert to fraction form
    65,396.73/90,246.63 = 38,540.37/x
  3. Step 3: Cross multiply
    65,396.73x = 90,246.63 × 38,540.37
  4. Step 4: Simplify right side
    65,396.73x = 3,478,138,511.45
  5. Step 5: Solve for x
    x = 3,478,138,511.45/65,396.73
  6. Step 6: Final answer
    x = 53,185.21

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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.