Home / 80,665,781.60-120,998,672.40-66,494,021.60

Finding the Fourth Proportional to 80,665,781.60, 120,998,672.40 and 66,494,021.60

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Solution

The fourth proportional to 80,665,781.60, 120,998,672.40 and 66,494,021.60 is: 99,741,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,665,781.60 : 120,998,672.40 = 66,494,021.60 : x
  2. Step 2: Convert to fraction form
    80,665,781.60/120,998,672.40 = 66,494,021.60/x
  3. Step 3: Cross multiply
    80,665,781.60x = 120,998,672.40 × 66,494,021.60
  4. Step 4: Simplify right side
    80,665,781.60x = 8,045,688,336,136,924
  5. Step 5: Solve for x
    x = 8,045,688,336,136,924/80,665,781.60
  6. Step 6: Final answer
    x = 99,741,032.40

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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.