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Finding the Fourth Proportional to 111,789.75, 154,224.34 and 63,381.49

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Solution

The fourth proportional to 111,789.75, 154,224.34 and 63,381.49 is: 87,440.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,789.75 : 154,224.34 = 63,381.49 : x
  2. Step 2: Convert to fraction form
    111,789.75/154,224.34 = 63,381.49/x
  3. Step 3: Cross multiply
    111,789.75x = 154,224.34 × 63,381.49
  4. Step 4: Simplify right side
    111,789.75x = 9,774,967,919.45
  5. Step 5: Solve for x
    x = 9,774,967,919.45/111,789.75
  6. Step 6: Final answer
    x = 87,440.64

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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.