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Finding the Fourth Proportional to 220,234.10, 303,917.94 and 128,347.54

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Solution

The fourth proportional to 220,234.10, 303,917.94 and 128,347.54 is: 177,116.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,234.10 : 303,917.94 = 128,347.54 : x
  2. Step 2: Convert to fraction form
    220,234.10/303,917.94 = 128,347.54/x
  3. Step 3: Cross multiply
    220,234.10x = 303,917.94 × 128,347.54
  4. Step 4: Simplify right side
    220,234.10x = 39,007,119,960.87
  5. Step 5: Solve for x
    x = 39,007,119,960.87/220,234.10
  6. Step 6: Final answer
    x = 177,116.62

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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.