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Finding the Fourth Proportional to 80,585.80, 120,878.70 and 80,002.60

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Solution

The fourth proportional to 80,585.80, 120,878.70 and 80,002.60 is: 120,003.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,585.80 : 120,878.70 = 80,002.60 : x
  2. Step 2: Convert to fraction form
    80,585.80/120,878.70 = 80,002.60/x
  3. Step 3: Cross multiply
    80,585.80x = 120,878.70 × 80,002.60
  4. Step 4: Simplify right side
    80,585.80x = 9,670,610,284.62
  5. Step 5: Solve for x
    x = 9,670,610,284.62/80,585.80
  6. Step 6: Final answer
    x = 120,003.90

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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.