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Finding the Fourth Proportional to 70,616.40, 105,828.48 and 35,580.12

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Solution

The fourth proportional to 70,616.40, 105,828.48 and 35,580.12 is: 53,321.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,616.40 : 105,828.48 = 35,580.12 : x
  2. Step 2: Convert to fraction form
    70,616.40/105,828.48 = 35,580.12/x
  3. Step 3: Cross multiply
    70,616.40x = 105,828.48 × 35,580.12
  4. Step 4: Simplify right side
    70,616.40x = 3,765,390,017.82
  5. Step 5: Solve for x
    x = 3,765,390,017.82/70,616.40
  6. Step 6: Final answer
    x = 53,321.75

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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.