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Finding the Fourth Proportional to 108,570.10, 162,855.15 and 71,245.30

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Solution

The fourth proportional to 108,570.10, 162,855.15 and 71,245.30 is: 106,867.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,570.10 : 162,855.15 = 71,245.30 : x
  2. Step 2: Convert to fraction form
    108,570.10/162,855.15 = 71,245.30/x
  3. Step 3: Cross multiply
    108,570.10x = 162,855.15 × 71,245.30
  4. Step 4: Simplify right side
    108,570.10x = 11,602,664,018.30
  5. Step 5: Solve for x
    x = 11,602,664,018.30/108,570.10
  6. Step 6: Final answer
    x = 106,867.95

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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.