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Finding the Fourth Proportional to 220,958.60, 331,437.90 and 136,977.80

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Solution

The fourth proportional to 220,958.60, 331,437.90 and 136,977.80 is: 205,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,958.60 : 331,437.90 = 136,977.80 : x
  2. Step 2: Convert to fraction form
    220,958.60/331,437.90 = 136,977.80/x
  3. Step 3: Cross multiply
    220,958.60x = 331,437.90 × 136,977.80
  4. Step 4: Simplify right side
    220,958.60x = 45,399,634,378.62
  5. Step 5: Solve for x
    x = 45,399,634,378.62/220,958.60
  6. Step 6: Final answer
    x = 205,466.70

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1.5x scale

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.