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Finding the Fourth Proportional to 194,639.49, 268,602.89 and 105,215.49

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Solution

The fourth proportional to 194,639.49, 268,602.89 and 105,215.49 is: 145,197.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,639.49 : 268,602.89 = 105,215.49 : x
  2. Step 2: Convert to fraction form
    194,639.49/268,602.89 = 105,215.49/x
  3. Step 3: Cross multiply
    194,639.49x = 268,602.89 × 105,215.49
  4. Step 4: Simplify right side
    194,639.49x = 28,261,184,160.69
  5. Step 5: Solve for x
    x = 28,261,184,160.69/194,639.49
  6. Step 6: Final answer
    x = 145,197.59

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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.