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Finding the Fourth Proportional to 100,608.75, 138,840.09 and 58,170.03

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Solution

The fourth proportional to 100,608.75, 138,840.09 and 58,170.03 is: 80,274.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.75 : 138,840.09 = 58,170.03 : x
  2. Step 2: Convert to fraction form
    100,608.75/138,840.09 = 58,170.03/x
  3. Step 3: Cross multiply
    100,608.75x = 138,840.09 × 58,170.03
  4. Step 4: Simplify right side
    100,608.75x = 8,076,332,200.50
  5. Step 5: Solve for x
    x = 8,076,332,200.50/100,608.75
  6. Step 6: Final answer
    x = 80,274.65

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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.