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Finding the Fourth Proportional to 128,333.53, 177,101.39 and 70,969.87

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Solution

The fourth proportional to 128,333.53, 177,101.39 and 70,969.87 is: 97,939.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,333.53 : 177,101.39 = 70,969.87 : x
  2. Step 2: Convert to fraction form
    128,333.53/177,101.39 = 70,969.87/x
  3. Step 3: Cross multiply
    128,333.53x = 177,101.39 × 70,969.87
  4. Step 4: Simplify right side
    128,333.53x = 12,568,861,384.76
  5. Step 5: Solve for x
    x = 12,568,861,384.76/128,333.53
  6. Step 6: Final answer
    x = 97,939.03

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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.