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Finding the Fourth Proportional to 76,998.80, 115,498.20 and 67,475.60

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Solution

The fourth proportional to 76,998.80, 115,498.20 and 67,475.60 is: 101,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,998.80 : 115,498.20 = 67,475.60 : x
  2. Step 2: Convert to fraction form
    76,998.80/115,498.20 = 67,475.60/x
  3. Step 3: Cross multiply
    76,998.80x = 115,498.20 × 67,475.60
  4. Step 4: Simplify right side
    76,998.80x = 7,793,310,343.92
  5. Step 5: Solve for x
    x = 7,793,310,343.92/76,998.80
  6. Step 6: Final answer
    x = 101,213.40

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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.