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Finding the Fourth Proportional to 80,485.80, 120,825.90 and 79,902.60

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Solution

The fourth proportional to 80,485.80, 120,825.90 and 79,902.60 is: 119,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.80 : 120,825.90 = 79,902.60 : x
  2. Step 2: Convert to fraction form
    80,485.80/120,825.90 = 79,902.60/x
  3. Step 3: Cross multiply
    80,485.80x = 120,825.90 × 79,902.60
  4. Step 4: Simplify right side
    80,485.80x = 9,654,303,557.34
  5. Step 5: Solve for x
    x = 9,654,303,557.34/80,485.80
  6. Step 6: Final answer
    x = 119,950.40

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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.