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Finding the Fourth Proportional to 80,476,960.80, 120,715,441.20 and 64,037,719.20

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Solution

The fourth proportional to 80,476,960.80, 120,715,441.20 and 64,037,719.20 is: 96,056,578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,476,960.80 : 120,715,441.20 = 64,037,719.20 : x
  2. Step 2: Convert to fraction form
    80,476,960.80/120,715,441.20 = 64,037,719.20/x
  3. Step 3: Cross multiply
    80,476,960.80x = 120,715,441.20 × 64,037,719.20
  4. Step 4: Simplify right side
    80,476,960.80x = 7,730,341,526,669,712
  5. Step 5: Solve for x
    x = 7,730,341,526,669,712/80,476,960.80
  6. Step 6: Final answer
    x = 96,056,578.80

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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.