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Finding the Fourth Proportional to 223,885.20, 308,961.09 and 121,909.08

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Solution

The fourth proportional to 223,885.20, 308,961.09 and 121,909.08 is: 168,234.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,885.20 : 308,961.09 = 121,909.08 : x
  2. Step 2: Convert to fraction form
    223,885.20/308,961.09 = 121,909.08/x
  3. Step 3: Cross multiply
    223,885.20x = 308,961.09 × 121,909.08
  4. Step 4: Simplify right side
    223,885.20x = 37,665,162,237.70
  5. Step 5: Solve for x
    x = 37,665,162,237.70/223,885.20
  6. Step 6: Final answer
    x = 168,234.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.