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Finding the Fourth Proportional to 111,940.90, 167,911.35 and 105,525.70

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Solution

The fourth proportional to 111,940.90, 167,911.35 and 105,525.70 is: 158,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,940.90 : 167,911.35 = 105,525.70 : x
  2. Step 2: Convert to fraction form
    111,940.90/167,911.35 = 105,525.70/x
  3. Step 3: Cross multiply
    111,940.90x = 167,911.35 × 105,525.70
  4. Step 4: Simplify right side
    111,940.90x = 17,718,962,746.70
  5. Step 5: Solve for x
    x = 17,718,962,746.70/111,940.90
  6. Step 6: Final answer
    x = 158,288.55

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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.