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Finding the Fourth Proportional to 57,431.52, 86,168.88 and 19,994.40

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Solution

The fourth proportional to 57,431.52, 86,168.88 and 19,994.40 is: 29,999.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,431.52 : 86,168.88 = 19,994.40 : x
  2. Step 2: Convert to fraction form
    57,431.52/86,168.88 = 19,994.40/x
  3. Step 3: Cross multiply
    57,431.52x = 86,168.88 × 19,994.40
  4. Step 4: Simplify right side
    57,431.52x = 1,722,895,054.27
  5. Step 5: Solve for x
    x = 1,722,895,054.27/57,431.52
  6. Step 6: Final answer
    x = 29,999.12

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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.