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Finding the Fourth Proportional to 80,620.96, 120,934.14 and 28,030.90

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Solution

The fourth proportional to 80,620.96, 120,934.14 and 28,030.90 is: 42,047.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.96 : 120,934.14 = 28,030.90 : x
  2. Step 2: Convert to fraction form
    80,620.96/120,934.14 = 28,030.90/x
  3. Step 3: Cross multiply
    80,620.96x = 120,934.14 × 28,030.90
  4. Step 4: Simplify right side
    80,620.96x = 3,389,892,784.93
  5. Step 5: Solve for x
    x = 3,389,892,784.93/80,620.96
  6. Step 6: Final answer
    x = 42,047.29

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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.