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Finding the Fourth Proportional to 218,918.61, 302,103.67 and 123,425.41

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Solution

The fourth proportional to 218,918.61, 302,103.67 and 123,425.41 is: 170,324.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,918.61 : 302,103.67 = 123,425.41 : x
  2. Step 2: Convert to fraction form
    218,918.61/302,103.67 = 123,425.41/x
  3. Step 3: Cross multiply
    218,918.61x = 302,103.67 × 123,425.41
  4. Step 4: Simplify right side
    218,918.61x = 37,287,269,332.25
  5. Step 5: Solve for x
    x = 37,287,269,332.25/218,918.61
  6. Step 6: Final answer
    x = 170,324.80

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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.