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Finding the Fourth Proportional to 98,074.80, 134,918.49 and 85,920.54

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Solution

The fourth proportional to 98,074.80, 134,918.49 and 85,920.54 is: 118,198.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,074.80 : 134,918.49 = 85,920.54 : x
  2. Step 2: Convert to fraction form
    98,074.80/134,918.49 = 85,920.54/x
  3. Step 3: Cross multiply
    98,074.80x = 134,918.49 × 85,920.54
  4. Step 4: Simplify right side
    98,074.80x = 11,592,269,516.78
  5. Step 5: Solve for x
    x = 11,592,269,516.78/98,074.80
  6. Step 6: Final answer
    x = 118,198.25

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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.