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Finding the Fourth Proportional to 118,852,212.80, 178,278,319.20 and 81,863,919.20

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Solution

The fourth proportional to 118,852,212.80, 178,278,319.20 and 81,863,919.20 is: 122,795,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,852,212.80 : 178,278,319.20 = 81,863,919.20 : x
  2. Step 2: Convert to fraction form
    118,852,212.80/178,278,319.20 = 81,863,919.20/x
  3. Step 3: Cross multiply
    118,852,212.80x = 178,278,319.20 × 81,863,919.20
  4. Step 4: Simplify right side
    118,852,212.80x = 14,594,561,918,100,608
  5. Step 5: Solve for x
    x = 14,594,561,918,100,608/118,852,212.80
  6. Step 6: Final answer
    x = 122,795,878.80

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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.