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Finding the Fourth Proportional to 218,783.75, 328,175.62 and 71,039.75

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Solution

The fourth proportional to 218,783.75, 328,175.62 and 71,039.75 is: 106,559.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,783.75 : 328,175.62 = 71,039.75 : x
  2. Step 2: Convert to fraction form
    218,783.75/328,175.62 = 71,039.75/x
  3. Step 3: Cross multiply
    218,783.75x = 328,175.62 × 71,039.75
  4. Step 4: Simplify right side
    218,783.75x = 23,313,512,182.42
  5. Step 5: Solve for x
    x = 23,313,512,182.42/218,783.75
  6. Step 6: Final answer
    x = 106,559.62

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1.5x scale

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.