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Finding the Fourth Proportional to 57,892.60, 86,838.90 and 20,494.90

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Solution

The fourth proportional to 57,892.60, 86,838.90 and 20,494.90 is: 30,742.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,892.60 : 86,838.90 = 20,494.90 : x
  2. Step 2: Convert to fraction form
    57,892.60/86,838.90 = 20,494.90/x
  3. Step 3: Cross multiply
    57,892.60x = 86,838.90 × 20,494.90
  4. Step 4: Simplify right side
    57,892.60x = 1,779,754,571.61
  5. Step 5: Solve for x
    x = 1,779,754,571.61/57,892.60
  6. Step 6: Final answer
    x = 30,742.35

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Similar ratio
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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.