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Finding the Fourth Proportional to 80,128.80, 119,998.80 and 76,629.60

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Solution

The fourth proportional to 80,128.80, 119,998.80 and 76,629.60 is: 114,758.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,128.80 : 119,998.80 = 76,629.60 : x
  2. Step 2: Convert to fraction form
    80,128.80/119,998.80 = 76,629.60/x
  3. Step 3: Cross multiply
    80,128.80x = 119,998.80 × 76,629.60
  4. Step 4: Simplify right side
    80,128.80x = 9,195,460,044.48
  5. Step 5: Solve for x
    x = 9,195,460,044.48/80,128.80
  6. Step 6: Final answer
    x = 114,758.49

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1.5x scale

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.