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Finding the Fourth Proportional to 208,173.81, 312,257.67 and 66,018.81

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Solution

The fourth proportional to 208,173.81, 312,257.67 and 66,018.81 is: 99,027.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,173.81 : 312,257.67 = 66,018.81 : x
  2. Step 2: Convert to fraction form
    208,173.81/312,257.67 = 66,018.81/x
  3. Step 3: Cross multiply
    208,173.81x = 312,257.67 × 66,018.81
  4. Step 4: Simplify right side
    208,173.81x = 20,614,879,786.77
  5. Step 5: Solve for x
    x = 20,614,879,786.77/208,173.81
  6. Step 6: Final answer
    x = 99,027.25

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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.