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Finding the Fourth Proportional to 80,653.80, 120,980.70 and 55,770.60

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Solution

The fourth proportional to 80,653.80, 120,980.70 and 55,770.60 is: 83,655.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,653.80 : 120,980.70 = 55,770.60 : x
  2. Step 2: Convert to fraction form
    80,653.80/120,980.70 = 55,770.60/x
  3. Step 3: Cross multiply
    80,653.80x = 120,980.70 × 55,770.60
  4. Step 4: Simplify right side
    80,653.80x = 6,747,166,227.42
  5. Step 5: Solve for x
    x = 6,747,166,227.42/80,653.80
  6. Step 6: Final answer
    x = 83,655.90

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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.