Home / 80,511.20-120,766.80-61,827.20

Finding the Fourth Proportional to 80,511.20, 120,766.80 and 61,827.20

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Solution

The fourth proportional to 80,511.20, 120,766.80 and 61,827.20 is: 92,740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,511.20 : 120,766.80 = 61,827.20 : x
  2. Step 2: Convert to fraction form
    80,511.20/120,766.80 = 61,827.20/x
  3. Step 3: Cross multiply
    80,511.20x = 120,766.80 × 61,827.20
  4. Step 4: Simplify right side
    80,511.20x = 7,466,673,096.96
  5. Step 5: Solve for x
    x = 7,466,673,096.96/80,511.20
  6. Step 6: Final answer
    x = 92,740.80

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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.