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Finding the Fourth Proportional to 127,728.90, 191,711.61 and 64,593.72

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Solution

The fourth proportional to 127,728.90, 191,711.61 and 64,593.72 is: 96,950.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,728.90 : 191,711.61 = 64,593.72 : x
  2. Step 2: Convert to fraction form
    127,728.90/191,711.61 = 64,593.72/x
  3. Step 3: Cross multiply
    127,728.90x = 191,711.61 × 64,593.72
  4. Step 4: Simplify right side
    127,728.90x = 12,383,366,057.09
  5. Step 5: Solve for x
    x = 12,383,366,057.09/127,728.90
  6. Step 6: Final answer
    x = 96,950.39

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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.