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Finding the Fourth Proportional to 77,725.85, 115,982.55 and 69,348.22

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Solution

The fourth proportional to 77,725.85, 115,982.55 and 69,348.22 is: 103,481.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,725.85 : 115,982.55 = 69,348.22 : x
  2. Step 2: Convert to fraction form
    77,725.85/115,982.55 = 69,348.22/x
  3. Step 3: Cross multiply
    77,725.85x = 115,982.55 × 69,348.22
  4. Step 4: Simplify right side
    77,725.85x = 8,043,183,103.60
  5. Step 5: Solve for x
    x = 8,043,183,103.60/77,725.85
  6. Step 6: Final answer
    x = 103,481.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.