Home / 72,771,324.80-109,156,987.20-66,819,185.60

Finding the Fourth Proportional to 72,771,324.80, 109,156,987.20 and 66,819,185.60

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Solution

The fourth proportional to 72,771,324.80, 109,156,987.20 and 66,819,185.60 is: 100,228,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771,324.80 : 109,156,987.20 = 66,819,185.60 : x
  2. Step 2: Convert to fraction form
    72,771,324.80/109,156,987.20 = 66,819,185.60/x
  3. Step 3: Cross multiply
    72,771,324.80x = 109,156,987.20 × 66,819,185.60
  4. Step 4: Simplify right side
    72,771,324.80x = 7,293,780,987,253,625
  5. Step 5: Solve for x
    x = 7,293,780,987,253,625/72,771,324.80
  6. Step 6: Final answer
    x = 100,228,778.40

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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.