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Finding the Fourth Proportional to 204,909.90, 307,036.80 and 129,895.80

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Solution

The fourth proportional to 204,909.90, 307,036.80 and 129,895.80 is: 194,635.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,909.90 : 307,036.80 = 129,895.80 : x
  2. Step 2: Convert to fraction form
    204,909.90/307,036.80 = 129,895.80/x
  3. Step 3: Cross multiply
    204,909.90x = 307,036.80 × 129,895.80
  4. Step 4: Simplify right side
    204,909.90x = 39,882,790,765.44
  5. Step 5: Solve for x
    x = 39,882,790,765.44/204,909.90
  6. Step 6: Final answer
    x = 194,635.74

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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.