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Finding the Fourth Proportional to 140,885.87, 211,360.69 and 80,942.02

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Solution

The fourth proportional to 140,885.87, 211,360.69 and 80,942.02 is: 121,431.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,885.87 : 211,360.69 = 80,942.02 : x
  2. Step 2: Convert to fraction form
    140,885.87/211,360.69 = 80,942.02/x
  3. Step 3: Cross multiply
    140,885.87x = 211,360.69 × 80,942.02
  4. Step 4: Simplify right side
    140,885.87x = 17,107,960,769.97
  5. Step 5: Solve for x
    x = 17,107,960,769.97/140,885.87
  6. Step 6: Final answer
    x = 121,431.35

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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.