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Finding the Fourth Proportional to 199,928.20, 299,907.80 and 66,808.93

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Solution

The fourth proportional to 199,928.20, 299,907.80 and 66,808.93 is: 100,218.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,928.20 : 299,907.80 = 66,808.93 : x
  2. Step 2: Convert to fraction form
    199,928.20/299,907.80 = 66,808.93/x
  3. Step 3: Cross multiply
    199,928.20x = 299,907.80 × 66,808.93
  4. Step 4: Simplify right side
    199,928.20x = 20,036,519,216.65
  5. Step 5: Solve for x
    x = 20,036,519,216.65/199,928.20
  6. Step 6: Final answer
    x = 100,218.57

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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.