Home / 128,383.56-177,177.51-71,795.34

Finding the Fourth Proportional to 128,383.56, 177,177.51 and 71,795.34

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Solution

The fourth proportional to 128,383.56, 177,177.51 and 71,795.34 is: 99,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.56 : 177,177.51 = 71,795.34 : x
  2. Step 2: Convert to fraction form
    128,383.56/177,177.51 = 71,795.34/x
  3. Step 3: Cross multiply
    128,383.56x = 177,177.51 × 71,795.34
  4. Step 4: Simplify right side
    128,383.56x = 12,720,519,570.80
  5. Step 5: Solve for x
    x = 12,720,519,570.80/128,383.56
  6. Step 6: Final answer
    x = 99,082.15

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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.