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Finding the Fourth Proportional to 221,911.92, 306,222 and 135,884.88

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Solution

The fourth proportional to 221,911.92, 306,222 and 135,884.88 is: 187,511.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,911.92 : 306,222 = 135,884.88 : x
  2. Step 2: Convert to fraction form
    221,911.92/306,222 = 135,884.88/x
  3. Step 3: Cross multiply
    221,911.92x = 306,222 × 135,884.88
  4. Step 4: Simplify right side
    221,911.92x = 41,610,939,723.36
  5. Step 5: Solve for x
    x = 41,610,939,723.36/221,911.92
  6. Step 6: Final answer
    x = 187,511.06

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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.