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Finding the Fourth Proportional to 68,405, 94,402.14 and 38,191.28

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Solution

The fourth proportional to 68,405, 94,402.14 and 38,191.28 is: 52,705.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,405 : 94,402.14 = 38,191.28 : x
  2. Step 2: Convert to fraction form
    68,405/94,402.14 = 38,191.28/x
  3. Step 3: Cross multiply
    68,405x = 94,402.14 × 38,191.28
  4. Step 4: Simplify right side
    68,405x = 3,605,338,561.34
  5. Step 5: Solve for x
    x = 3,605,338,561.34/68,405
  6. Step 6: Final answer
    x = 52,705.78

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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.