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Finding the Fourth Proportional to 108,310.90, 162,442.05 and 71,131.90

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Solution

The fourth proportional to 108,310.90, 162,442.05 and 71,131.90 is: 106,681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,310.90 : 162,442.05 = 71,131.90 : x
  2. Step 2: Convert to fraction form
    108,310.90/162,442.05 = 71,131.90/x
  3. Step 3: Cross multiply
    108,310.90x = 162,442.05 × 71,131.90
  4. Step 4: Simplify right side
    108,310.90x = 11,554,811,656.40
  5. Step 5: Solve for x
    x = 11,554,811,656.40/108,310.90
  6. Step 6: Final answer
    x = 106,681.89

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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.