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Finding the Fourth Proportional to 53,389.60, 80,086 and 18,328.72

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Solution

The fourth proportional to 53,389.60, 80,086 and 18,328.72 is: 27,493.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,389.60 : 80,086 = 18,328.72 : x
  2. Step 2: Convert to fraction form
    53,389.60/80,086 = 18,328.72/x
  3. Step 3: Cross multiply
    53,389.60x = 80,086 × 18,328.72
  4. Step 4: Simplify right side
    53,389.60x = 1,467,873,869.92
  5. Step 5: Solve for x
    x = 1,467,873,869.92/53,389.60
  6. Step 6: Final answer
    x = 27,493.63

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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.