Home / 154,198.80-212,795.68-85,287.11

Finding the Fourth Proportional to 154,198.80, 212,795.68 and 85,287.11

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Solution

The fourth proportional to 154,198.80, 212,795.68 and 85,287.11 is: 117,696.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,198.80 : 212,795.68 = 85,287.11 : x
  2. Step 2: Convert to fraction form
    154,198.80/212,795.68 = 85,287.11/x
  3. Step 3: Cross multiply
    154,198.80x = 212,795.68 × 85,287.11
  4. Step 4: Simplify right side
    154,198.80x = 18,148,728,567.68
  5. Step 5: Solve for x
    x = 18,148,728,567.68/154,198.80
  6. Step 6: Final answer
    x = 117,696.95

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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.