Home / 78,144.60-117,195.30-31,402.20

Finding the Fourth Proportional to 78,144.60, 117,195.30 and 31,402.20

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Solution

The fourth proportional to 78,144.60, 117,195.30 and 31,402.20 is: 47,094.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,144.60 : 117,195.30 = 31,402.20 : x
  2. Step 2: Convert to fraction form
    78,144.60/117,195.30 = 31,402.20/x
  3. Step 3: Cross multiply
    78,144.60x = 117,195.30 × 31,402.20
  4. Step 4: Simplify right side
    78,144.60x = 3,680,190,249.66
  5. Step 5: Solve for x
    x = 3,680,190,249.66/78,144.60
  6. Step 6: Final answer
    x = 47,094.62

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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.