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Finding the Fourth Proportional to 199,920.80, 299,896.68 and 66,801.52

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Solution

The fourth proportional to 199,920.80, 299,896.68 and 66,801.52 is: 100,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,920.80 : 299,896.68 = 66,801.52 : x
  2. Step 2: Convert to fraction form
    199,920.80/299,896.68 = 66,801.52/x
  3. Step 3: Cross multiply
    199,920.80x = 299,896.68 × 66,801.52
  4. Step 4: Simplify right side
    199,920.80x = 20,033,554,066.95
  5. Step 5: Solve for x
    x = 20,033,554,066.95/199,920.80
  6. Step 6: Final answer
    x = 100,207.45

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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.