Home / 128,987.62-193,556.13-54,101.10

Finding the Fourth Proportional to 128,987.62, 193,556.13 and 54,101.10

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Solution

The fourth proportional to 128,987.62, 193,556.13 and 54,101.10 is: 81,182.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,987.62 : 193,556.13 = 54,101.10 : x
  2. Step 2: Convert to fraction form
    128,987.62/193,556.13 = 54,101.10/x
  3. Step 3: Cross multiply
    128,987.62x = 193,556.13 × 54,101.10
  4. Step 4: Simplify right side
    128,987.62x = 10,471,599,544.74
  5. Step 5: Solve for x
    x = 10,471,599,544.74/128,987.62
  6. Step 6: Final answer
    x = 81,182.98

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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.