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Finding the Fourth Proportional to 445,778.71, 668,665.76 and 108,821.14

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Solution

The fourth proportional to 445,778.71, 668,665.76 and 108,821.14 is: 163,231.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,778.71 : 668,665.76 = 108,821.14 : x
  2. Step 2: Convert to fraction form
    445,778.71/668,665.76 = 108,821.14/x
  3. Step 3: Cross multiply
    445,778.71x = 668,665.76 × 108,821.14
  4. Step 4: Simplify right side
    445,778.71x = 72,764,968,066.40
  5. Step 5: Solve for x
    x = 72,764,968,066.40/445,778.71
  6. Step 6: Final answer
    x = 163,231.14

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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.