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Finding the Fourth Proportional to 108,603.18, 162,804.54 and 75,338.94

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Solution

The fourth proportional to 108,603.18, 162,804.54 and 75,338.94 is: 112,938.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,603.18 : 162,804.54 = 75,338.94 : x
  2. Step 2: Convert to fraction form
    108,603.18/162,804.54 = 75,338.94/x
  3. Step 3: Cross multiply
    108,603.18x = 162,804.54 × 75,338.94
  4. Step 4: Simplify right side
    108,603.18x = 12,265,521,470.79
  5. Step 5: Solve for x
    x = 12,265,521,470.79/108,603.18
  6. Step 6: Final answer
    x = 112,938.88

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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.