Home / 81,678,007.20-122,367,711.60-66,449,488.80

Finding the Fourth Proportional to 81,678,007.20, 122,367,711.60 and 66,449,488.80

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Solution

The fourth proportional to 81,678,007.20, 122,367,711.60 and 66,449,488.80 is: 99,552,770.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678,007.20 : 122,367,711.60 = 66,449,488.80 : x
  2. Step 2: Convert to fraction form
    81,678,007.20/122,367,711.60 = 66,449,488.80/x
  3. Step 3: Cross multiply
    81,678,007.20x = 122,367,711.60 × 66,449,488.80
  4. Step 4: Simplify right side
    81,678,007.20x = 8,131,271,881,445,829
  5. Step 5: Solve for x
    x = 8,131,271,881,445,829/81,678,007.20
  6. Step 6: Final answer
    x = 99,552,770.20

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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.