Home / 80,642,805.10-120,964,207.65-72,328,705.90

Finding the Fourth Proportional to 80,642,805.10, 120,964,207.65 and 72,328,705.90

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Solution

The fourth proportional to 80,642,805.10, 120,964,207.65 and 72,328,705.90 is: 108,493,058.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642,805.10 : 120,964,207.65 = 72,328,705.90 : x
  2. Step 2: Convert to fraction form
    80,642,805.10/120,964,207.65 = 72,328,705.90/x
  3. Step 3: Cross multiply
    80,642,805.10x = 120,964,207.65 × 72,328,705.90
  4. Step 4: Simplify right side
    80,642,805.10x = 8,749,184,599,543,381
  5. Step 5: Solve for x
    x = 8,749,184,599,543,381/80,642,805.10
  6. Step 6: Final answer
    x = 108,493,058.85

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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.