Home / 128,330.39-177,096.35-71,741.77

Finding the Fourth Proportional to 128,330.39, 177,096.35 and 71,741.77

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Solution

The fourth proportional to 128,330.39, 177,096.35 and 71,741.77 is: 99,003.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.39 : 177,096.35 = 71,741.77 : x
  2. Step 2: Convert to fraction form
    128,330.39/177,096.35 = 71,741.77/x
  3. Step 3: Cross multiply
    128,330.39x = 177,096.35 × 71,741.77
  4. Step 4: Simplify right side
    128,330.39x = 12,705,205,346.15
  5. Step 5: Solve for x
    x = 12,705,205,346.15/128,330.39
  6. Step 6: Final answer
    x = 99,003.87

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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.