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Finding the Fourth Proportional to 111,939.70, 167,908.53 and 45,364

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Solution

The fourth proportional to 111,939.70, 167,908.53 and 45,364 is: 68,045.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.70 : 167,908.53 = 45,364 : x
  2. Step 2: Convert to fraction form
    111,939.70/167,908.53 = 45,364/x
  3. Step 3: Cross multiply
    111,939.70x = 167,908.53 × 45,364
  4. Step 4: Simplify right side
    111,939.70x = 7,617,002,554.92
  5. Step 5: Solve for x
    x = 7,617,002,554.92/111,939.70
  6. Step 6: Final answer
    x = 68,045.59

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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.