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Finding the Fourth Proportional to 108,115.60, 162,367.80 and 78,566.80

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Solution

The fourth proportional to 108,115.60, 162,367.80 and 78,566.80 is: 117,991.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,115.60 : 162,367.80 = 78,566.80 : x
  2. Step 2: Convert to fraction form
    108,115.60/162,367.80 = 78,566.80/x
  3. Step 3: Cross multiply
    108,115.60x = 162,367.80 × 78,566.80
  4. Step 4: Simplify right side
    108,115.60x = 12,756,718,469.04
  5. Step 5: Solve for x
    x = 12,756,718,469.04/108,115.60
  6. Step 6: Final answer
    x = 117,991.47

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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.