Home / 81,649,906.10-122,474,859.15-78,878,539.70

Finding the Fourth Proportional to 81,649,906.10, 122,474,859.15 and 78,878,539.70

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Solution

The fourth proportional to 81,649,906.10, 122,474,859.15 and 78,878,539.70 is: 118,317,809.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,906.10 : 122,474,859.15 = 78,878,539.70 : x
  2. Step 2: Convert to fraction form
    81,649,906.10/122,474,859.15 = 78,878,539.70/x
  3. Step 3: Cross multiply
    81,649,906.10x = 122,474,859.15 × 78,878,539.70
  4. Step 4: Simplify right side
    81,649,906.10x = 9,660,638,039,715,184
  5. Step 5: Solve for x
    x = 9,660,638,039,715,184/81,649,906.10
  6. Step 6: Final answer
    x = 118,317,809.55

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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.