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Finding the Fourth Proportional to 199,658.20, 299,414.40 and 66,542.80

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Solution

The fourth proportional to 199,658.20, 299,414.40 and 66,542.80 is: 99,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,658.20 : 299,414.40 = 66,542.80 : x
  2. Step 2: Convert to fraction form
    199,658.20/299,414.40 = 66,542.80/x
  3. Step 3: Cross multiply
    199,658.20x = 299,414.40 × 66,542.80
  4. Step 4: Simplify right side
    199,658.20x = 19,923,872,536.32
  5. Step 5: Solve for x
    x = 19,923,872,536.32/199,658.20
  6. Step 6: Final answer
    x = 99,789.90

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1.5x scale

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.