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Finding the Fourth Proportional to 71,019.82, 98,007.63 and 39,189.64

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Solution

The fourth proportional to 71,019.82, 98,007.63 and 39,189.64 is: 54,081.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,019.82 : 98,007.63 = 39,189.64 : x
  2. Step 2: Convert to fraction form
    71,019.82/98,007.63 = 39,189.64/x
  3. Step 3: Cross multiply
    71,019.82x = 98,007.63 × 39,189.64
  4. Step 4: Simplify right side
    71,019.82x = 3,840,883,736.95
  5. Step 5: Solve for x
    x = 3,840,883,736.95/71,019.82
  6. Step 6: Final answer
    x = 54,081.86

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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.