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Finding the Fourth Proportional to 108,069.60, 162,007.20 and 68,606.40

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Solution

The fourth proportional to 108,069.60, 162,007.20 and 68,606.40 is: 102,847.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,069.60 : 162,007.20 = 68,606.40 : x
  2. Step 2: Convert to fraction form
    108,069.60/162,007.20 = 68,606.40/x
  3. Step 3: Cross multiply
    108,069.60x = 162,007.20 × 68,606.40
  4. Step 4: Simplify right side
    108,069.60x = 11,114,730,766.08
  5. Step 5: Solve for x
    x = 11,114,730,766.08/108,069.60
  6. Step 6: Final answer
    x = 102,847.89

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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.