Home / 128,564.43-177,416.96-71,977.83

Finding the Fourth Proportional to 128,564.43, 177,416.96 and 71,977.83

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Solution

The fourth proportional to 128,564.43, 177,416.96 and 71,977.83 is: 99,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.43 : 177,416.96 = 71,977.83 : x
  2. Step 2: Convert to fraction form
    128,564.43/177,416.96 = 71,977.83/x
  3. Step 3: Cross multiply
    128,564.43x = 177,416.96 × 71,977.83
  4. Step 4: Simplify right side
    128,564.43x = 12,770,087,786.00
  5. Step 5: Solve for x
    x = 12,770,087,786.00/128,564.43
  6. Step 6: Final answer
    x = 99,328.31

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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.