Home / 80,639.46-120,979.64-56,993.53

Finding the Fourth Proportional to 80,639.46, 120,979.64 and 56,993.53

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Solution

The fourth proportional to 80,639.46, 120,979.64 and 56,993.53 is: 85,504.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639.46 : 120,979.64 = 56,993.53 : x
  2. Step 2: Convert to fraction form
    80,639.46/120,979.64 = 56,993.53/x
  3. Step 3: Cross multiply
    80,639.46x = 120,979.64 × 56,993.53
  4. Step 4: Simplify right side
    80,639.46x = 6,895,056,741.73
  5. Step 5: Solve for x
    x = 6,895,056,741.73/80,639.46
  6. Step 6: Final answer
    x = 85,504.75

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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.