Home / 128,820.73-177,609.14-92,070.80

Finding the Fourth Proportional to 128,820.73, 177,609.14 and 92,070.80

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Solution

The fourth proportional to 128,820.73, 177,609.14 and 92,070.80 is: 126,940.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,820.73 : 177,609.14 = 92,070.80 : x
  2. Step 2: Convert to fraction form
    128,820.73/177,609.14 = 92,070.80/x
  3. Step 3: Cross multiply
    128,820.73x = 177,609.14 × 92,070.80
  4. Step 4: Simplify right side
    128,820.73x = 16,352,615,146.76
  5. Step 5: Solve for x
    x = 16,352,615,146.76/128,820.73
  6. Step 6: Final answer
    x = 126,940.87

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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.