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Finding the Fourth Proportional to 128,872.85, 193,080.60 and 53,827.89

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Solution

The fourth proportional to 128,872.85, 193,080.60 and 53,827.89 is: 80,646.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,872.85 : 193,080.60 = 53,827.89 : x
  2. Step 2: Convert to fraction form
    128,872.85/193,080.60 = 53,827.89/x
  3. Step 3: Cross multiply
    128,872.85x = 193,080.60 × 53,827.89
  4. Step 4: Simplify right side
    128,872.85x = 10,393,121,297.93
  5. Step 5: Solve for x
    x = 10,393,121,297.93/128,872.85
  6. Step 6: Final answer
    x = 80,646.32

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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.