Home / 218,936.49-302,137.61-122,139.60

Finding the Fourth Proportional to 218,936.49, 302,137.61 and 122,139.60

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Solution

The fourth proportional to 218,936.49, 302,137.61 and 122,139.60 is: 168,555.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,936.49 : 302,137.61 = 122,139.60 : x
  2. Step 2: Convert to fraction form
    218,936.49/302,137.61 = 122,139.60/x
  3. Step 3: Cross multiply
    218,936.49x = 302,137.61 × 122,139.60
  4. Step 4: Simplify right side
    218,936.49x = 36,902,966,219.66
  5. Step 5: Solve for x
    x = 36,902,966,219.66/218,936.49
  6. Step 6: Final answer
    x = 168,555.58

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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.