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Finding the Fourth Proportional to 216,912.60, 325,368.90 and 111,936.60

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Solution

The fourth proportional to 216,912.60, 325,368.90 and 111,936.60 is: 167,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,912.60 : 325,368.90 = 111,936.60 : x
  2. Step 2: Convert to fraction form
    216,912.60/325,368.90 = 111,936.60/x
  3. Step 3: Cross multiply
    216,912.60x = 325,368.90 × 111,936.60
  4. Step 4: Simplify right side
    216,912.60x = 36,420,688,411.74
  5. Step 5: Solve for x
    x = 36,420,688,411.74/216,912.60
  6. Step 6: Final answer
    x = 167,904.90

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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.