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Finding the Fourth Proportional to 128,674.53, 193,087.53 and 53,788.86

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Solution

The fourth proportional to 128,674.53, 193,087.53 and 53,788.86 is: 80,714.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,674.53 : 193,087.53 = 53,788.86 : x
  2. Step 2: Convert to fraction form
    128,674.53/193,087.53 = 53,788.86/x
  3. Step 3: Cross multiply
    128,674.53x = 193,087.53 × 53,788.86
  4. Step 4: Simplify right side
    128,674.53x = 10,385,958,118.92
  5. Step 5: Solve for x
    x = 10,385,958,118.92/128,674.53
  6. Step 6: Final answer
    x = 80,714.95

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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.