Home / 81,390.45-122,085.68-28,793.10

Finding the Fourth Proportional to 81,390.45, 122,085.68 and 28,793.10

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Solution

The fourth proportional to 81,390.45, 122,085.68 and 28,793.10 is: 43,189.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.45 : 122,085.68 = 28,793.10 : x
  2. Step 2: Convert to fraction form
    81,390.45/122,085.68 = 28,793.10/x
  3. Step 3: Cross multiply
    81,390.45x = 122,085.68 × 28,793.10
  4. Step 4: Simplify right side
    81,390.45x = 3,515,225,048.84
  5. Step 5: Solve for x
    x = 3,515,225,048.84/81,390.45
  6. Step 6: Final answer
    x = 43,189.65

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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.