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Finding the Fourth Proportional to 128,057.40, 192,086.10 and 96,953.40

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Solution

The fourth proportional to 128,057.40, 192,086.10 and 96,953.40 is: 145,430.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,057.40 : 192,086.10 = 96,953.40 : x
  2. Step 2: Convert to fraction form
    128,057.40/192,086.10 = 96,953.40/x
  3. Step 3: Cross multiply
    128,057.40x = 192,086.10 × 96,953.40
  4. Step 4: Simplify right side
    128,057.40x = 18,623,400,487.74
  5. Step 5: Solve for x
    x = 18,623,400,487.74/128,057.40
  6. Step 6: Final answer
    x = 145,430.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.