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Finding the Fourth Proportional to 50,489.60, 75,686.40 and 18,891.20

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Solution

The fourth proportional to 50,489.60, 75,686.40 and 18,891.20 is: 28,318.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,489.60 : 75,686.40 = 18,891.20 : x
  2. Step 2: Convert to fraction form
    50,489.60/75,686.40 = 18,891.20/x
  3. Step 3: Cross multiply
    50,489.60x = 75,686.40 × 18,891.20
  4. Step 4: Simplify right side
    50,489.60x = 1,429,806,919.68
  5. Step 5: Solve for x
    x = 1,429,806,919.68/50,489.60
  6. Step 6: Final answer
    x = 28,318.84

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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.