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Finding the Fourth Proportional to 72,725.50, 100,361.79 and 40,894.12

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Solution

The fourth proportional to 72,725.50, 100,361.79 and 40,894.12 is: 56,434.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,725.50 : 100,361.79 = 40,894.12 : x
  2. Step 2: Convert to fraction form
    72,725.50/100,361.79 = 40,894.12/x
  3. Step 3: Cross multiply
    72,725.50x = 100,361.79 × 40,894.12
  4. Step 4: Simplify right side
    72,725.50x = 4,104,206,377.40
  5. Step 5: Solve for x
    x = 4,104,206,377.40/72,725.50
  6. Step 6: Final answer
    x = 56,434.22

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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.