Home / 128,921.60-177,910.46-71,561.43

Finding the Fourth Proportional to 128,921.60, 177,910.46 and 71,561.43

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Solution

The fourth proportional to 128,921.60, 177,910.46 and 71,561.43 is: 98,754.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,921.60 : 177,910.46 = 71,561.43 : x
  2. Step 2: Convert to fraction form
    128,921.60/177,910.46 = 71,561.43/x
  3. Step 3: Cross multiply
    128,921.60x = 177,910.46 × 71,561.43
  4. Step 4: Simplify right side
    128,921.60x = 12,731,526,814.25
  5. Step 5: Solve for x
    x = 12,731,526,814.25/128,921.60
  6. Step 6: Final answer
    x = 98,754.02

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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.