Home / 128,519.13-177,361.94-71,158.45

Finding the Fourth Proportional to 128,519.13, 177,361.94 and 71,158.45

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Solution

The fourth proportional to 128,519.13, 177,361.94 and 71,158.45 is: 98,201.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,519.13 : 177,361.94 = 71,158.45 : x
  2. Step 2: Convert to fraction form
    128,519.13/177,361.94 = 71,158.45/x
  3. Step 3: Cross multiply
    128,519.13x = 177,361.94 × 71,158.45
  4. Step 4: Simplify right side
    128,519.13x = 12,620,800,207.04
  5. Step 5: Solve for x
    x = 12,620,800,207.04/128,519.13
  6. Step 6: Final answer
    x = 98,201.72

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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.