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Finding the Fourth Proportional to 53,391.60, 80,089 and 18,330.72

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Solution

The fourth proportional to 53,391.60, 80,089 and 18,330.72 is: 27,496.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,391.60 : 80,089 = 18,330.72 : x
  2. Step 2: Convert to fraction form
    53,391.60/80,089 = 18,330.72/x
  3. Step 3: Cross multiply
    53,391.60x = 80,089 × 18,330.72
  4. Step 4: Simplify right side
    53,391.60x = 1,468,089,034.08
  5. Step 5: Solve for x
    x = 1,468,089,034.08/53,391.60
  6. Step 6: Final answer
    x = 27,496.63

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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.