Home / 128,736.62-177,667.01-71,381.64

Finding the Fourth Proportional to 128,736.62, 177,667.01 and 71,381.64

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Solution

The fourth proportional to 128,736.62, 177,667.01 and 71,381.64 is: 98,512.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.62 : 177,667.01 = 71,381.64 : x
  2. Step 2: Convert to fraction form
    128,736.62/177,667.01 = 71,381.64/x
  3. Step 3: Cross multiply
    128,736.62x = 177,667.01 × 71,381.64
  4. Step 4: Simplify right side
    128,736.62x = 12,682,161,302.45
  5. Step 5: Solve for x
    x = 12,682,161,302.45/128,736.62
  6. Step 6: Final answer
    x = 98,512.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.