Home / 80,642,736.10-120,964,104.15-72,328,636.90

Finding the Fourth Proportional to 80,642,736.10, 120,964,104.15 and 72,328,636.90

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Solution

The fourth proportional to 80,642,736.10, 120,964,104.15 and 72,328,636.90 is: 108,492,955.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642,736.10 : 120,964,104.15 = 72,328,636.90 : x
  2. Step 2: Convert to fraction form
    80,642,736.10/120,964,104.15 = 72,328,636.90/x
  3. Step 3: Cross multiply
    80,642,736.10x = 120,964,104.15 × 72,328,636.90
  4. Step 4: Simplify right side
    80,642,736.10x = 8,749,168,766,999,134
  5. Step 5: Solve for x
    x = 8,749,168,766,999,134/80,642,736.10
  6. Step 6: Final answer
    x = 108,492,955.35

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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.