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Finding the Fourth Proportional to 71,677.96, 98,914.44 and 39,842.80

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Solution

The fourth proportional to 71,677.96, 98,914.44 and 39,842.80 is: 54,982.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,677.96 : 98,914.44 = 39,842.80 : x
  2. Step 2: Convert to fraction form
    71,677.96/98,914.44 = 39,842.80/x
  3. Step 3: Cross multiply
    71,677.96x = 98,914.44 × 39,842.80
  4. Step 4: Simplify right side
    71,677.96x = 3,941,028,250.03
  5. Step 5: Solve for x
    x = 3,941,028,250.03/71,677.96
  6. Step 6: Final answer
    x = 54,982.43

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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.