Home / 78,418.40-117,627.60-76,863.20

Finding the Fourth Proportional to 78,418.40, 117,627.60 and 76,863.20

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Solution

The fourth proportional to 78,418.40, 117,627.60 and 76,863.20 is: 115,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418.40 : 117,627.60 = 76,863.20 : x
  2. Step 2: Convert to fraction form
    78,418.40/117,627.60 = 76,863.20/x
  3. Step 3: Cross multiply
    78,418.40x = 117,627.60 × 76,863.20
  4. Step 4: Simplify right side
    78,418.40x = 9,041,233,744.32
  5. Step 5: Solve for x
    x = 9,041,233,744.32/78,418.40
  6. Step 6: Final answer
    x = 115,294.80

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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.