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Finding the Fourth Proportional to 111,975.40, 167,768.70 and 72,512.20

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Solution

The fourth proportional to 111,975.40, 167,768.70 and 72,512.20 is: 108,642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,975.40 : 167,768.70 = 72,512.20 : x
  2. Step 2: Convert to fraction form
    111,975.40/167,768.70 = 72,512.20/x
  3. Step 3: Cross multiply
    111,975.40x = 167,768.70 × 72,512.20
  4. Step 4: Simplify right side
    111,975.40x = 12,165,277,528.14
  5. Step 5: Solve for x
    x = 12,165,277,528.14/111,975.40
  6. Step 6: Final answer
    x = 108,642.41

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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.