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Finding the Fourth Proportional to 203,361.69, 305,029.17 and 70,243.86

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Solution

The fourth proportional to 203,361.69, 305,029.17 and 70,243.86 is: 105,361.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,361.69 : 305,029.17 = 70,243.86 : x
  2. Step 2: Convert to fraction form
    203,361.69/305,029.17 = 70,243.86/x
  3. Step 3: Cross multiply
    203,361.69x = 305,029.17 × 70,243.86
  4. Step 4: Simplify right side
    203,361.69x = 21,426,426,313.40
  5. Step 5: Solve for x
    x = 21,426,426,313.40/203,361.69
  6. Step 6: Final answer
    x = 105,361.17

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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.