Home / 128,579.74-192,776.19-53,721.29

Finding the Fourth Proportional to 128,579.74, 192,776.19 and 53,721.29

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Solution

The fourth proportional to 128,579.74, 192,776.19 and 53,721.29 is: 80,542.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,579.74 : 192,776.19 = 53,721.29 : x
  2. Step 2: Convert to fraction form
    128,579.74/192,776.19 = 53,721.29/x
  3. Step 3: Cross multiply
    128,579.74x = 192,776.19 × 53,721.29
  4. Step 4: Simplify right side
    128,579.74x = 10,356,184,978.02
  5. Step 5: Solve for x
    x = 10,356,184,978.02/128,579.74
  6. Step 6: Final answer
    x = 80,542.90

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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.