Home / 80,642,760.60-120,964,140.90-72,328,661.40

Finding the Fourth Proportional to 80,642,760.60, 120,964,140.90 and 72,328,661.40

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Solution

The fourth proportional to 80,642,760.60, 120,964,140.90 and 72,328,661.40 is: 108,492,992.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642,760.60 : 120,964,140.90 = 72,328,661.40 : x
  2. Step 2: Convert to fraction form
    80,642,760.60/120,964,140.90 = 72,328,661.40/x
  3. Step 3: Cross multiply
    80,642,760.60x = 120,964,140.90 × 72,328,661.40
  4. Step 4: Simplify right side
    80,642,760.60x = 8,749,174,388,697,992
  5. Step 5: Solve for x
    x = 8,749,174,388,697,992/80,642,760.60
  6. Step 6: Final answer
    x = 108,492,992.10

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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.