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Finding the Fourth Proportional to 80,690.80, 121,036.20 and 73,433.20

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Solution

The fourth proportional to 80,690.80, 121,036.20 and 73,433.20 is: 110,149.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,690.80 : 121,036.20 = 73,433.20 : x
  2. Step 2: Convert to fraction form
    80,690.80/121,036.20 = 73,433.20/x
  3. Step 3: Cross multiply
    80,690.80x = 121,036.20 × 73,433.20
  4. Step 4: Simplify right side
    80,690.80x = 8,888,075,481.84
  5. Step 5: Solve for x
    x = 8,888,075,481.84/80,690.80
  6. Step 6: Final answer
    x = 110,149.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.