Home / 128,758.48-193,213.12-53,872.36

Finding the Fourth Proportional to 128,758.48, 193,213.12 and 53,872.36

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Solution

The fourth proportional to 128,758.48, 193,213.12 and 53,872.36 is: 80,840.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,758.48 : 193,213.12 = 53,872.36 : x
  2. Step 2: Convert to fraction form
    128,758.48/193,213.12 = 53,872.36/x
  3. Step 3: Cross multiply
    128,758.48x = 193,213.12 × 53,872.36
  4. Step 4: Simplify right side
    128,758.48x = 10,408,846,757.36
  5. Step 5: Solve for x
    x = 10,408,846,757.36/128,758.48
  6. Step 6: Final answer
    x = 80,840.09

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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.