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Finding the Fourth Proportional to 78,975.60, 118,420.20 and 32,175.60

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Solution

The fourth proportional to 78,975.60, 118,420.20 and 32,175.60 is: 48,245.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,975.60 : 118,420.20 = 32,175.60 : x
  2. Step 2: Convert to fraction form
    78,975.60/118,420.20 = 32,175.60/x
  3. Step 3: Cross multiply
    78,975.60x = 118,420.20 × 32,175.60
  4. Step 4: Simplify right side
    78,975.60x = 3,810,240,987.12
  5. Step 5: Solve for x
    x = 3,810,240,987.12/78,975.60
  6. Step 6: Final answer
    x = 48,245.80

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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.