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Finding the Fourth Proportional to 518,186.81, 777,173.00 and 139,017.66

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Solution

The fourth proportional to 518,186.81, 777,173.00 and 139,017.66 is: 208,497.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,186.81 : 777,173.00 = 139,017.66 : x
  2. Step 2: Convert to fraction form
    518,186.81/777,173.00 = 139,017.66/x
  3. Step 3: Cross multiply
    518,186.81x = 777,173.00 × 139,017.66
  4. Step 4: Simplify right side
    518,186.81x = 108,040,771,180.09
  5. Step 5: Solve for x
    x = 108,040,771,180.09/518,186.81
  6. Step 6: Final answer
    x = 208,497.72

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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.