Home / 128,434.43-177,241.14-80,055.90

Finding the Fourth Proportional to 128,434.43, 177,241.14 and 80,055.90

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Solution

The fourth proportional to 128,434.43, 177,241.14 and 80,055.90 is: 110,478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,434.43 : 177,241.14 = 80,055.90 : x
  2. Step 2: Convert to fraction form
    128,434.43/177,241.14 = 80,055.90/x
  3. Step 3: Cross multiply
    128,434.43x = 177,241.14 × 80,055.90
  4. Step 4: Simplify right side
    128,434.43x = 14,189,198,979.73
  5. Step 5: Solve for x
    x = 14,189,198,979.73/128,434.43
  6. Step 6: Final answer
    x = 110,478.16

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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.