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Finding the Fourth Proportional to 108,713.61, 162,988.17 and 71,283.11

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Solution

The fourth proportional to 108,713.61, 162,988.17 and 71,283.11 is: 106,870.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,713.61 : 162,988.17 = 71,283.11 : x
  2. Step 2: Convert to fraction form
    108,713.61/162,988.17 = 71,283.11/x
  3. Step 3: Cross multiply
    108,713.61x = 162,988.17 × 71,283.11
  4. Step 4: Simplify right side
    108,713.61x = 11,618,302,835.87
  5. Step 5: Solve for x
    x = 11,618,302,835.87/108,713.61
  6. Step 6: Final answer
    x = 106,870.73

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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.