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Finding the Fourth Proportional to 220,039.72, 330,056.94 and 70,278

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Solution

The fourth proportional to 220,039.72, 330,056.94 and 70,278 is: 105,416.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,039.72 : 330,056.94 = 70,278 : x
  2. Step 2: Convert to fraction form
    220,039.72/330,056.94 = 70,278/x
  3. Step 3: Cross multiply
    220,039.72x = 330,056.94 × 70,278
  4. Step 4: Simplify right side
    220,039.72x = 23,195,741,629.32
  5. Step 5: Solve for x
    x = 23,195,741,629.32/220,039.72
  6. Step 6: Final answer
    x = 105,416.16

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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.