Home / 128,988.12-193,556.88-54,101.60

Finding the Fourth Proportional to 128,988.12, 193,556.88 and 54,101.60

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Solution

The fourth proportional to 128,988.12, 193,556.88 and 54,101.60 is: 81,183.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988.12 : 193,556.88 = 54,101.60 : x
  2. Step 2: Convert to fraction form
    128,988.12/193,556.88 = 54,101.60/x
  3. Step 3: Cross multiply
    128,988.12x = 193,556.88 × 54,101.60
  4. Step 4: Simplify right side
    128,988.12x = 10,471,736,899.01
  5. Step 5: Solve for x
    x = 10,471,736,899.01/128,988.12
  6. Step 6: Final answer
    x = 81,183.73

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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.