Home / 128,827.20-192,949.20-76,339.20

Finding the Fourth Proportional to 128,827.20, 192,949.20 and 76,339.20

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Solution

The fourth proportional to 128,827.20, 192,949.20 and 76,339.20 is: 114,336.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,827.20 : 192,949.20 = 76,339.20 : x
  2. Step 2: Convert to fraction form
    128,827.20/192,949.20 = 76,339.20/x
  3. Step 3: Cross multiply
    128,827.20x = 192,949.20 × 76,339.20
  4. Step 4: Simplify right side
    128,827.20x = 14,729,587,568.64
  5. Step 5: Solve for x
    x = 14,729,587,568.64/128,827.20
  6. Step 6: Final answer
    x = 114,336.01

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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.