Home / 280,968.40-421,452.60-81,295.30

Finding the Fourth Proportional to 280,968.40, 421,452.60 and 81,295.30

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Solution

The fourth proportional to 280,968.40, 421,452.60 and 81,295.30 is: 121,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,968.40 : 421,452.60 = 81,295.30 : x
  2. Step 2: Convert to fraction form
    280,968.40/421,452.60 = 81,295.30/x
  3. Step 3: Cross multiply
    280,968.40x = 421,452.60 × 81,295.30
  4. Step 4: Simplify right side
    280,968.40x = 34,262,115,552.78
  5. Step 5: Solve for x
    x = 34,262,115,552.78/280,968.40
  6. Step 6: Final answer
    x = 121,942.95

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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.