Home / 80,543.41-120,815.21-30,611.77

Finding the Fourth Proportional to 80,543.41, 120,815.21 and 30,611.77

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Solution

The fourth proportional to 80,543.41, 120,815.21 and 30,611.77 is: 45,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,543.41 : 120,815.21 = 30,611.77 : x
  2. Step 2: Convert to fraction form
    80,543.41/120,815.21 = 30,611.77/x
  3. Step 3: Cross multiply
    80,543.41x = 120,815.21 × 30,611.77
  4. Step 4: Simplify right side
    80,543.41x = 3,698,367,421.02
  5. Step 5: Solve for x
    x = 3,698,367,421.02/80,543.41
  6. Step 6: Final answer
    x = 45,917.69

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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.