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Finding the Fourth Proportional to 140,998.80, 194,621.90 and 90,697.80

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Solution

The fourth proportional to 140,998.80, 194,621.90 and 90,697.80 is: 125,190.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,998.80 : 194,621.90 = 90,697.80 : x
  2. Step 2: Convert to fraction form
    140,998.80/194,621.90 = 90,697.80/x
  3. Step 3: Cross multiply
    140,998.80x = 194,621.90 × 90,697.80
  4. Step 4: Simplify right side
    140,998.80x = 17,651,777,658.73
  5. Step 5: Solve for x
    x = 17,651,777,658.73/140,998.80
  6. Step 6: Final answer
    x = 125,190.98

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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.