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Finding the Fourth Proportional to 207,728.80, 311,690.40 and 108,001.60

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Solution

The fourth proportional to 207,728.80, 311,690.40 and 108,001.60 is: 162,052.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,728.80 : 311,690.40 = 108,001.60 : x
  2. Step 2: Convert to fraction form
    207,728.80/311,690.40 = 108,001.60/x
  3. Step 3: Cross multiply
    207,728.80x = 311,690.40 × 108,001.60
  4. Step 4: Simplify right side
    207,728.80x = 33,663,061,904.64
  5. Step 5: Solve for x
    x = 33,663,061,904.64/207,728.80
  6. Step 6: Final answer
    x = 162,052.94

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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.