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Finding the Fourth Proportional to 167,920.36, 231,720.42 and 100,839.40

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Solution

The fourth proportional to 167,920.36, 231,720.42 and 100,839.40 is: 139,152.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,920.36 : 231,720.42 = 100,839.40 : x
  2. Step 2: Convert to fraction form
    167,920.36/231,720.42 = 100,839.40/x
  3. Step 3: Cross multiply
    167,920.36x = 231,720.42 × 100,839.40
  4. Step 4: Simplify right side
    167,920.36x = 23,366,548,120.55
  5. Step 5: Solve for x
    x = 23,366,548,120.55/167,920.36
  6. Step 6: Final answer
    x = 139,152.56

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1.5x scale

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.