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Finding the Fourth Proportional to 190,697.89, 285,936.06 and 72,304.65

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Solution

The fourth proportional to 190,697.89, 285,936.06 and 72,304.65 is: 108,414.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,697.89 : 285,936.06 = 72,304.65 : x
  2. Step 2: Convert to fraction form
    190,697.89/285,936.06 = 72,304.65/x
  3. Step 3: Cross multiply
    190,697.89x = 285,936.06 × 72,304.65
  4. Step 4: Simplify right side
    190,697.89x = 20,674,506,740.68
  5. Step 5: Solve for x
    x = 20,674,506,740.68/190,697.89
  6. Step 6: Final answer
    x = 108,414.97

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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.