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Finding the Fourth Proportional to 111,938.90, 167,908.35 and 105,523.70

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Solution

The fourth proportional to 111,938.90, 167,908.35 and 105,523.70 is: 158,285.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,938.90 : 167,908.35 = 105,523.70 : x
  2. Step 2: Convert to fraction form
    111,938.90/167,908.35 = 105,523.70/x
  3. Step 3: Cross multiply
    111,938.90x = 167,908.35 × 105,523.70
  4. Step 4: Simplify right side
    111,938.90x = 17,718,310,352.90
  5. Step 5: Solve for x
    x = 17,718,310,352.90/111,938.90
  6. Step 6: Final answer
    x = 158,285.55

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1.5x scale

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.