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Finding the Fourth Proportional to 108,872.70, 163,107.45 and 61,986.30

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Solution

The fourth proportional to 108,872.70, 163,107.45 and 61,986.30 is: 92,864.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,872.70 : 163,107.45 = 61,986.30 : x
  2. Step 2: Convert to fraction form
    108,872.70/163,107.45 = 61,986.30/x
  3. Step 3: Cross multiply
    108,872.70x = 163,107.45 × 61,986.30
  4. Step 4: Simplify right side
    108,872.70x = 10,110,427,327.94
  5. Step 5: Solve for x
    x = 10,110,427,327.94/108,872.70
  6. Step 6: Final answer
    x = 92,864.67

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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.