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Finding the Fourth Proportional to 216,974.05, 325,231.44 and 98,728.43

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Solution

The fourth proportional to 216,974.05, 325,231.44 and 98,728.43 is: 147,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,974.05 : 325,231.44 = 98,728.43 : x
  2. Step 2: Convert to fraction form
    216,974.05/325,231.44 = 98,728.43/x
  3. Step 3: Cross multiply
    216,974.05x = 325,231.44 × 98,728.43
  4. Step 4: Simplify right side
    216,974.05x = 32,109,587,461.45
  5. Step 5: Solve for x
    x = 32,109,587,461.45/216,974.05
  6. Step 6: Final answer
    x = 147,988.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.