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Finding the Fourth Proportional to 83,290.30, 114,939.15 and 51,019.90

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Solution

The fourth proportional to 83,290.30, 114,939.15 and 51,019.90 is: 70,406.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,290.30 : 114,939.15 = 51,019.90 : x
  2. Step 2: Convert to fraction form
    83,290.30/114,939.15 = 51,019.90/x
  3. Step 3: Cross multiply
    83,290.30x = 114,939.15 × 51,019.90
  4. Step 4: Simplify right side
    83,290.30x = 5,864,183,939.09
  5. Step 5: Solve for x
    x = 5,864,183,939.09/83,290.30
  6. Step 6: Final answer
    x = 70,406.57

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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.