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Finding the Fourth Proportional to 289,390.68, 434,116.11 and 79,028.64

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Solution

The fourth proportional to 289,390.68, 434,116.11 and 79,028.64 is: 118,551.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,390.68 : 434,116.11 = 79,028.64 : x
  2. Step 2: Convert to fraction form
    289,390.68/434,116.11 = 79,028.64/x
  3. Step 3: Cross multiply
    289,390.68x = 434,116.11 × 79,028.64
  4. Step 4: Simplify right side
    289,390.68x = 34,307,605,775.39
  5. Step 5: Solve for x
    x = 34,307,605,775.39/289,390.68
  6. Step 6: Final answer
    x = 118,551.18

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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.