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Finding the Fourth Proportional to 70,645.66, 105,968.54 and 18,055.19

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Solution

The fourth proportional to 70,645.66, 105,968.54 and 18,055.19 is: 27,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,645.66 : 105,968.54 = 18,055.19 : x
  2. Step 2: Convert to fraction form
    70,645.66/105,968.54 = 18,055.19/x
  3. Step 3: Cross multiply
    70,645.66x = 105,968.54 × 18,055.19
  4. Step 4: Simplify right side
    70,645.66x = 1,913,282,033.45
  5. Step 5: Solve for x
    x = 1,913,282,033.45/70,645.66
  6. Step 6: Final answer
    x = 27,082.80

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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.