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Finding the Fourth Proportional to 270,307.25, 405,067.20 and 129,901.85

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Solution

The fourth proportional to 270,307.25, 405,067.20 and 129,901.85 is: 194,663.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,307.25 : 405,067.20 = 129,901.85 : x
  2. Step 2: Convert to fraction form
    270,307.25/405,067.20 = 129,901.85/x
  3. Step 3: Cross multiply
    270,307.25x = 405,067.20 × 129,901.85
  4. Step 4: Simplify right side
    270,307.25x = 52,618,976,628.98
  5. Step 5: Solve for x
    x = 52,618,976,628.98/270,307.25
  6. Step 6: Final answer
    x = 194,663.58

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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.