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Finding the Fourth Proportional to 221,842.54, 306,197.13 and 126,405.64

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Solution

The fourth proportional to 221,842.54, 306,197.13 and 126,405.64 is: 174,470.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,842.54 : 306,197.13 = 126,405.64 : x
  2. Step 2: Convert to fraction form
    221,842.54/306,197.13 = 126,405.64/x
  3. Step 3: Cross multiply
    221,842.54x = 306,197.13 × 126,405.64
  4. Step 4: Simplify right side
    221,842.54x = 38,705,044,183.81
  5. Step 5: Solve for x
    x = 38,705,044,183.81/221,842.54
  6. Step 6: Final answer
    x = 174,470.79

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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.