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Finding the Fourth Proportional to 72,975.75, 100,706.55 and 39,441.75

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Solution

The fourth proportional to 72,975.75, 100,706.55 and 39,441.75 is: 54,429.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,975.75 : 100,706.55 = 39,441.75 : x
  2. Step 2: Convert to fraction form
    72,975.75/100,706.55 = 39,441.75/x
  3. Step 3: Cross multiply
    72,975.75x = 100,706.55 × 39,441.75
  4. Step 4: Simplify right side
    72,975.75x = 3,972,042,568.46
  5. Step 5: Solve for x
    x = 3,972,042,568.46/72,975.75
  6. Step 6: Final answer
    x = 54,429.62

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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.