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Finding the Fourth Proportional to 82,978,830.80, 124,468,246.20 and 44,715,078.80

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Solution

The fourth proportional to 82,978,830.80, 124,468,246.20 and 44,715,078.80 is: 67,072,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,978,830.80 : 124,468,246.20 = 44,715,078.80 : x
  2. Step 2: Convert to fraction form
    82,978,830.80/124,468,246.20 = 44,715,078.80/x
  3. Step 3: Cross multiply
    82,978,830.80x = 124,468,246.20 × 44,715,078.80
  4. Step 4: Simplify right side
    82,978,830.80x = 5,565,607,436,930,800
  5. Step 5: Solve for x
    x = 5,565,607,436,930,800/82,978,830.80
  6. Step 6: Final answer
    x = 67,072,618.20

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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.