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Finding the Fourth Proportional to 78,699.60, 118,049.40 and 41,245.20

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Solution

The fourth proportional to 78,699.60, 118,049.40 and 41,245.20 is: 61,867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699.60 : 118,049.40 = 41,245.20 : x
  2. Step 2: Convert to fraction form
    78,699.60/118,049.40 = 41,245.20/x
  3. Step 3: Cross multiply
    78,699.60x = 118,049.40 × 41,245.20
  4. Step 4: Simplify right side
    78,699.60x = 4,868,971,112.88
  5. Step 5: Solve for x
    x = 4,868,971,112.88/78,699.60
  6. Step 6: Final answer
    x = 61,867.80

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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.