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Finding the Fourth Proportional to 136,620.51, 204,930.57 and 36,780.81

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Solution

The fourth proportional to 136,620.51, 204,930.57 and 36,780.81 is: 55,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,620.51 : 204,930.57 = 36,780.81 : x
  2. Step 2: Convert to fraction form
    136,620.51/204,930.57 = 36,780.81/x
  3. Step 3: Cross multiply
    136,620.51x = 204,930.57 × 36,780.81
  4. Step 4: Simplify right side
    136,620.51x = 7,537,511,333.71
  5. Step 5: Solve for x
    x = 7,537,511,333.71/136,620.51
  6. Step 6: Final answer
    x = 55,171.16

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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.