Home / 89,021.70-122,907.31-79,445.21

Finding the Fourth Proportional to 89,021.70, 122,907.31 and 79,445.21

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Solution

The fourth proportional to 89,021.70, 122,907.31 and 79,445.21 is: 109,685.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,021.70 : 122,907.31 = 79,445.21 : x
  2. Step 2: Convert to fraction form
    89,021.70/122,907.31 = 79,445.21/x
  3. Step 3: Cross multiply
    89,021.70x = 122,907.31 × 79,445.21
  4. Step 4: Simplify right side
    89,021.70x = 9,764,396,240.34
  5. Step 5: Solve for x
    x = 9,764,396,240.34/89,021.70
  6. Step 6: Final answer
    x = 109,685.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.