Home / 128,022.30-192,033.45-80,783.10

Finding the Fourth Proportional to 128,022.30, 192,033.45 and 80,783.10

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Solution

The fourth proportional to 128,022.30, 192,033.45 and 80,783.10 is: 121,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,022.30 : 192,033.45 = 80,783.10 : x
  2. Step 2: Convert to fraction form
    128,022.30/192,033.45 = 80,783.10/x
  3. Step 3: Cross multiply
    128,022.30x = 192,033.45 × 80,783.10
  4. Step 4: Simplify right side
    128,022.30x = 15,513,057,394.70
  5. Step 5: Solve for x
    x = 15,513,057,394.70/128,022.30
  6. Step 6: Final answer
    x = 121,174.65

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1.5x scale

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.