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Finding the Fourth Proportional to 65,365.73, 90,220.09 and 39,893.17

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Solution

The fourth proportional to 65,365.73, 90,220.09 and 39,893.17 is: 55,061.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,365.73 : 90,220.09 = 39,893.17 : x
  2. Step 2: Convert to fraction form
    65,365.73/90,220.09 = 39,893.17/x
  3. Step 3: Cross multiply
    65,365.73x = 90,220.09 × 39,893.17
  4. Step 4: Simplify right side
    65,365.73x = 3,599,165,489.44
  5. Step 5: Solve for x
    x = 3,599,165,489.44/65,365.73
  6. Step 6: Final answer
    x = 55,061.96

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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.