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Finding the Fourth Proportional to 81,157.36, 111,997.72 and 45,348.88

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Solution

The fourth proportional to 81,157.36, 111,997.72 and 45,348.88 is: 62,581.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,157.36 : 111,997.72 = 45,348.88 : x
  2. Step 2: Convert to fraction form
    81,157.36/111,997.72 = 45,348.88/x
  3. Step 3: Cross multiply
    81,157.36x = 111,997.72 × 45,348.88
  4. Step 4: Simplify right side
    81,157.36x = 5,078,971,164.55
  5. Step 5: Solve for x
    x = 5,078,971,164.55/81,157.36
  6. Step 6: Final answer
    x = 62,581.77

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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.