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Finding the Fourth Proportional to 71,212.66, 98,274.12 and 39,383.68

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Solution

The fourth proportional to 71,212.66, 98,274.12 and 39,383.68 is: 54,349.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,212.66 : 98,274.12 = 39,383.68 : x
  2. Step 2: Convert to fraction form
    71,212.66/98,274.12 = 39,383.68/x
  3. Step 3: Cross multiply
    71,212.66x = 98,274.12 × 39,383.68
  4. Step 4: Simplify right side
    71,212.66x = 3,870,396,494.36
  5. Step 5: Solve for x
    x = 3,870,396,494.36/71,212.66
  6. Step 6: Final answer
    x = 54,349.84

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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.