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Finding the Fourth Proportional to 53,381.60, 80,074.08 and 18,320.80

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Solution

The fourth proportional to 53,381.60, 80,074.08 and 18,320.80 is: 27,481.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,381.60 : 80,074.08 = 18,320.80 : x
  2. Step 2: Convert to fraction form
    53,381.60/80,074.08 = 18,320.80/x
  3. Step 3: Cross multiply
    53,381.60x = 80,074.08 × 18,320.80
  4. Step 4: Simplify right side
    53,381.60x = 1,467,021,204.86
  5. Step 5: Solve for x
    x = 1,467,021,204.86/53,381.60
  6. Step 6: Final answer
    x = 27,481.78

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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.