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Finding the Fourth Proportional to 80,656.60, 120,984.90 and 45,664.60

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Solution

The fourth proportional to 80,656.60, 120,984.90 and 45,664.60 is: 68,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,656.60 : 120,984.90 = 45,664.60 : x
  2. Step 2: Convert to fraction form
    80,656.60/120,984.90 = 45,664.60/x
  3. Step 3: Cross multiply
    80,656.60x = 120,984.90 × 45,664.60
  4. Step 4: Simplify right side
    80,656.60x = 5,524,727,064.54
  5. Step 5: Solve for x
    x = 5,524,727,064.54/80,656.60
  6. Step 6: Final answer
    x = 68,496.90

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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.