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Finding the Fourth Proportional to 122,512.32, 168,912 and 80,003.52

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Solution

The fourth proportional to 122,512.32, 168,912 and 80,003.52 is: 110,303.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,512.32 : 168,912 = 80,003.52 : x
  2. Step 2: Convert to fraction form
    122,512.32/168,912 = 80,003.52/x
  3. Step 3: Cross multiply
    122,512.32x = 168,912 × 80,003.52
  4. Step 4: Simplify right side
    122,512.32x = 13,513,554,570.24
  5. Step 5: Solve for x
    x = 13,513,554,570.24/122,512.32
  6. Step 6: Final answer
    x = 110,303.64

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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.