Home / 128,629.80-192,935.10-53,730.60

Finding the Fourth Proportional to 128,629.80, 192,935.10 and 53,730.60

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Solution

The fourth proportional to 128,629.80, 192,935.10 and 53,730.60 is: 80,591.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,629.80 : 192,935.10 = 53,730.60 : x
  2. Step 2: Convert to fraction form
    128,629.80/192,935.10 = 53,730.60/x
  3. Step 3: Cross multiply
    128,629.80x = 192,935.10 × 53,730.60
  4. Step 4: Simplify right side
    128,629.80x = 10,366,518,684.06
  5. Step 5: Solve for x
    x = 10,366,518,684.06/128,629.80
  6. Step 6: Final answer
    x = 80,591.89

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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.