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Finding the Fourth Proportional to 149,173.56, 205,859.52 and 81,190.80

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Solution

The fourth proportional to 149,173.56, 205,859.52 and 81,190.80 is: 112,043.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,173.56 : 205,859.52 = 81,190.80 : x
  2. Step 2: Convert to fraction form
    149,173.56/205,859.52 = 81,190.80/x
  3. Step 3: Cross multiply
    149,173.56x = 205,859.52 × 81,190.80
  4. Step 4: Simplify right side
    149,173.56x = 16,713,899,116.42
  5. Step 5: Solve for x
    x = 16,713,899,116.42/149,173.56
  6. Step 6: Final answer
    x = 112,043.31

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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.