Home / 199,321.60-298,982.40-128,819.20

Finding the Fourth Proportional to 199,321.60, 298,982.40 and 128,819.20

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Solution

The fourth proportional to 199,321.60, 298,982.40 and 128,819.20 is: 193,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,321.60 : 298,982.40 = 128,819.20 : x
  2. Step 2: Convert to fraction form
    199,321.60/298,982.40 = 128,819.20/x
  3. Step 3: Cross multiply
    199,321.60x = 298,982.40 × 128,819.20
  4. Step 4: Simplify right side
    199,321.60x = 38,514,673,582.08
  5. Step 5: Solve for x
    x = 38,514,673,582.08/199,321.60
  6. Step 6: Final answer
    x = 193,228.80

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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.