Home / 128,085.72-191,997.30-53,249.28

Finding the Fourth Proportional to 128,085.72, 191,997.30 and 53,249.28

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Solution

The fourth proportional to 128,085.72, 191,997.30 and 53,249.28 is: 79,819.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.72 : 191,997.30 = 53,249.28 : x
  2. Step 2: Convert to fraction form
    128,085.72/191,997.30 = 53,249.28/x
  3. Step 3: Cross multiply
    128,085.72x = 191,997.30 × 53,249.28
  4. Step 4: Simplify right side
    128,085.72x = 10,223,717,986.94
  5. Step 5: Solve for x
    x = 10,223,717,986.94/128,085.72
  6. Step 6: Final answer
    x = 79,819.34

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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.