Home / 128,519.57-177,352.22-71,157.76

Finding the Fourth Proportional to 128,519.57, 177,352.22 and 71,157.76

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Solution

The fourth proportional to 128,519.57, 177,352.22 and 71,157.76 is: 98,195.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,519.57 : 177,352.22 = 71,157.76 : x
  2. Step 2: Convert to fraction form
    128,519.57/177,352.22 = 71,157.76/x
  3. Step 3: Cross multiply
    128,519.57x = 177,352.22 × 71,157.76
  4. Step 4: Simplify right side
    128,519.57x = 12,619,986,440.74
  5. Step 5: Solve for x
    x = 12,619,986,440.74/128,519.57
  6. Step 6: Final answer
    x = 98,195.05

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1.5x scale

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.