Home / 128,646.23-177,618.43-80,321.73

Finding the Fourth Proportional to 128,646.23, 177,618.43 and 80,321.73

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Solution

The fourth proportional to 128,646.23, 177,618.43 and 80,321.73 is: 110,898.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,646.23 : 177,618.43 = 80,321.73 : x
  2. Step 2: Convert to fraction form
    128,646.23/177,618.43 = 80,321.73/x
  3. Step 3: Cross multiply
    128,646.23x = 177,618.43 × 80,321.73
  4. Step 4: Simplify right side
    128,646.23x = 14,266,619,577.48
  5. Step 5: Solve for x
    x = 14,266,619,577.48/128,646.23
  6. Step 6: Final answer
    x = 110,898.08

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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.