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Finding the Fourth Proportional to 57,856.58, 86,797.90 and 20,419.32

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Solution

The fourth proportional to 57,856.58, 86,797.90 and 20,419.32 is: 30,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,856.58 : 86,797.90 = 20,419.32 : x
  2. Step 2: Convert to fraction form
    57,856.58/86,797.90 = 20,419.32/x
  3. Step 3: Cross multiply
    57,856.58x = 86,797.90 × 20,419.32
  4. Step 4: Simplify right side
    57,856.58x = 1,772,354,095.43
  5. Step 5: Solve for x
    x = 1,772,354,095.43/57,856.58
  6. Step 6: Final answer
    x = 30,633.58

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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.