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Finding the Fourth Proportional to 69,999.75, 104,999.63 and 20,751.75

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Solution

The fourth proportional to 69,999.75, 104,999.63 and 20,751.75 is: 31,127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,999.75 : 104,999.63 = 20,751.75 : x
  2. Step 2: Convert to fraction form
    69,999.75/104,999.63 = 20,751.75/x
  3. Step 3: Cross multiply
    69,999.75x = 104,999.63 × 20,751.75
  4. Step 4: Simplify right side
    69,999.75x = 2,178,925,968.09
  5. Step 5: Solve for x
    x = 2,178,925,968.09/69,999.75
  6. Step 6: Final answer
    x = 31,127.63

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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.