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Finding the Fourth Proportional to 100,608.38, 138,839.56 and 58,169.64

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Solution

The fourth proportional to 100,608.38, 138,839.56 and 58,169.64 is: 80,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.38 : 138,839.56 = 58,169.64 : x
  2. Step 2: Convert to fraction form
    100,608.38/138,839.56 = 58,169.64/x
  3. Step 3: Cross multiply
    100,608.38x = 138,839.56 × 58,169.64
  4. Step 4: Simplify right side
    100,608.38x = 8,076,247,077.53
  5. Step 5: Solve for x
    x = 8,076,247,077.53/100,608.38
  6. Step 6: Final answer
    x = 80,274.10

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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.