Home / 120,185,972.42-180,278,678.32-78,947,157.65

Finding the Fourth Proportional to 120,185,972.42, 180,278,678.32 and 78,947,157.65

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Solution

The fourth proportional to 120,185,972.42, 180,278,678.32 and 78,947,157.65 is: 118,420,552.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185,972.42 : 180,278,678.32 = 78,947,157.65 : x
  2. Step 2: Convert to fraction form
    120,185,972.42/180,278,678.32 = 78,947,157.65/x
  3. Step 3: Cross multiply
    120,185,972.42x = 180,278,678.32 × 78,947,157.65
  4. Step 4: Simplify right side
    120,185,972.42x = 14,232,489,237,867,942
  5. Step 5: Solve for x
    x = 14,232,489,237,867,942/120,185,972.42
  6. Step 6: Final answer
    x = 118,420,552.34

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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.