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Finding the Fourth Proportional to 71,208.66, 98,268.60 and 39,379.68

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Solution

The fourth proportional to 71,208.66, 98,268.60 and 39,379.68 is: 54,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,208.66 : 98,268.60 = 39,379.68 : x
  2. Step 2: Convert to fraction form
    71,208.66/98,268.60 = 39,379.68/x
  3. Step 3: Cross multiply
    71,208.66x = 98,268.60 × 39,379.68
  4. Step 4: Simplify right side
    71,208.66x = 3,869,786,022.05
  5. Step 5: Solve for x
    x = 3,869,786,022.05/71,208.66
  6. Step 6: Final answer
    x = 54,344.32

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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.