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Finding the Fourth Proportional to 218,379.98, 301,339.95 and 122,919.50

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Solution

The fourth proportional to 218,379.98, 301,339.95 and 122,919.50 is: 169,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,379.98 : 301,339.95 = 122,919.50 : x
  2. Step 2: Convert to fraction form
    218,379.98/301,339.95 = 122,919.50/x
  3. Step 3: Cross multiply
    218,379.98x = 301,339.95 × 122,919.50
  4. Step 4: Simplify right side
    218,379.98x = 37,040,555,984.03
  5. Step 5: Solve for x
    x = 37,040,555,984.03/218,379.98
  6. Step 6: Final answer
    x = 169,615.16

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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.