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Finding the Fourth Proportional to 108,615.60, 162,923.40 and 71,290.80

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Solution

The fourth proportional to 108,615.60, 162,923.40 and 71,290.80 is: 106,936.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,615.60 : 162,923.40 = 71,290.80 : x
  2. Step 2: Convert to fraction form
    108,615.60/162,923.40 = 71,290.80/x
  3. Step 3: Cross multiply
    108,615.60x = 162,923.40 × 71,290.80
  4. Step 4: Simplify right side
    108,615.60x = 11,614,939,524.72
  5. Step 5: Solve for x
    x = 11,614,939,524.72/108,615.60
  6. Step 6: Final answer
    x = 106,936.20

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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.