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Finding the Fourth Proportional to 72,975.48, 100,706.11 and 39,441.48

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Solution

The fourth proportional to 72,975.48, 100,706.11 and 39,441.48 is: 54,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,975.48 : 100,706.11 = 39,441.48 : x
  2. Step 2: Convert to fraction form
    72,975.48/100,706.11 = 39,441.48/x
  3. Step 3: Cross multiply
    72,975.48x = 100,706.11 × 39,441.48
  4. Step 4: Simplify right side
    72,975.48x = 3,971,997,322.70
  5. Step 5: Solve for x
    x = 3,971,997,322.70/72,975.48
  6. Step 6: Final answer
    x = 54,429.21

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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.