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Finding the Fourth Proportional to 104,375.75, 143,949.69 and 72,620.51

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Solution

The fourth proportional to 104,375.75, 143,949.69 and 72,620.51 is: 100,154.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,375.75 : 143,949.69 = 72,620.51 : x
  2. Step 2: Convert to fraction form
    104,375.75/143,949.69 = 72,620.51/x
  3. Step 3: Cross multiply
    104,375.75x = 143,949.69 × 72,620.51
  4. Step 4: Simplify right side
    104,375.75x = 10,453,699,182.39
  5. Step 5: Solve for x
    x = 10,453,699,182.39/104,375.75
  6. Step 6: Final answer
    x = 100,154.49

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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.