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Finding the Fourth Proportional to 203,405.09, 305,093.96 and 70,287.17

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Solution

The fourth proportional to 203,405.09, 305,093.96 and 70,287.17 is: 105,426.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,405.09 : 305,093.96 = 70,287.17 : x
  2. Step 2: Convert to fraction form
    203,405.09/305,093.96 = 70,287.17/x
  3. Step 3: Cross multiply
    203,405.09x = 305,093.96 × 70,287.17
  4. Step 4: Simplify right side
    203,405.09x = 21,444,190,681.06
  5. Step 5: Solve for x
    x = 21,444,190,681.06/203,405.09
  6. Step 6: Final answer
    x = 105,426.03

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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.