Home / 78,124.20-117,327.10-68,447.40

Finding the Fourth Proportional to 78,124.20, 117,327.10 and 68,447.40

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Solution

The fourth proportional to 78,124.20, 117,327.10 and 68,447.40 is: 102,794.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,124.20 : 117,327.10 = 68,447.40 : x
  2. Step 2: Convert to fraction form
    78,124.20/117,327.10 = 68,447.40/x
  3. Step 3: Cross multiply
    78,124.20x = 117,327.10 × 68,447.40
  4. Step 4: Simplify right side
    78,124.20x = 8,030,734,944.54
  5. Step 5: Solve for x
    x = 8,030,734,944.54/78,124.20
  6. Step 6: Final answer
    x = 102,794.46

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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.