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Finding the Fourth Proportional to 218,620.89, 301,697.87 and 123,129.27

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Solution

The fourth proportional to 218,620.89, 301,697.87 and 123,129.27 is: 169,918.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,620.89 : 301,697.87 = 123,129.27 : x
  2. Step 2: Convert to fraction form
    218,620.89/301,697.87 = 123,129.27/x
  3. Step 3: Cross multiply
    218,620.89x = 301,697.87 × 123,129.27
  4. Step 4: Simplify right side
    218,620.89x = 37,147,837,878.01
  5. Step 5: Solve for x
    x = 37,147,837,878.01/218,620.89
  6. Step 6: Final answer
    x = 169,918.98

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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.