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Finding the Fourth Proportional to 108,620.60, 162,930.90 and 100,747.40

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Solution

The fourth proportional to 108,620.60, 162,930.90 and 100,747.40 is: 151,121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,620.60 : 162,930.90 = 100,747.40 : x
  2. Step 2: Convert to fraction form
    108,620.60/162,930.90 = 100,747.40/x
  3. Step 3: Cross multiply
    108,620.60x = 162,930.90 × 100,747.40
  4. Step 4: Simplify right side
    108,620.60x = 16,414,864,554.66
  5. Step 5: Solve for x
    x = 16,414,864,554.66/108,620.60
  6. Step 6: Final answer
    x = 151,121.10

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1.5x scale

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.