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Finding the Fourth Proportional to 78,886.80, 118,272.60 and 32,115.60

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Solution

The fourth proportional to 78,886.80, 118,272.60 and 32,115.60 is: 48,149.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.80 : 118,272.60 = 32,115.60 : x
  2. Step 2: Convert to fraction form
    78,886.80/118,272.60 = 32,115.60/x
  3. Step 3: Cross multiply
    78,886.80x = 118,272.60 × 32,115.60
  4. Step 4: Simplify right side
    78,886.80x = 3,798,395,512.56
  5. Step 5: Solve for x
    x = 3,798,395,512.56/78,886.80
  6. Step 6: Final answer
    x = 48,149.95

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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.