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Finding the Fourth Proportional to 128,891.95, 193,408.40 and 50,009.29

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Solution

The fourth proportional to 128,891.95, 193,408.40 and 50,009.29 is: 75,041.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,891.95 : 193,408.40 = 50,009.29 : x
  2. Step 2: Convert to fraction form
    128,891.95/193,408.40 = 50,009.29/x
  3. Step 3: Cross multiply
    128,891.95x = 193,408.40 × 50,009.29
  4. Step 4: Simplify right side
    128,891.95x = 9,672,216,513.99
  5. Step 5: Solve for x
    x = 9,672,216,513.99/128,891.95
  6. Step 6: Final answer
    x = 75,041.28

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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.