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Finding the Fourth Proportional to 78,633.60, 117,777.60 and 68,265.60

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Solution

The fourth proportional to 78,633.60, 117,777.60 and 68,265.60 is: 102,248.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,633.60 : 117,777.60 = 68,265.60 : x
  2. Step 2: Convert to fraction form
    78,633.60/117,777.60 = 68,265.60/x
  3. Step 3: Cross multiply
    78,633.60x = 117,777.60 × 68,265.60
  4. Step 4: Simplify right side
    78,633.60x = 8,040,158,530.56
  5. Step 5: Solve for x
    x = 8,040,158,530.56/78,633.60
  6. Step 6: Final answer
    x = 102,248.38

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1.5x scale

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.