Home / 81,693,007.70-122,539,511.55-72,764,798.90

Finding the Fourth Proportional to 81,693,007.70, 122,539,511.55 and 72,764,798.90

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Solution

The fourth proportional to 81,693,007.70, 122,539,511.55 and 72,764,798.90 is: 109,147,198.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693,007.70 : 122,539,511.55 = 72,764,798.90 : x
  2. Step 2: Convert to fraction form
    81,693,007.70/122,539,511.55 = 72,764,798.90/x
  3. Step 3: Cross multiply
    81,693,007.70x = 122,539,511.55 × 72,764,798.90
  4. Step 4: Simplify right side
    81,693,007.70x = 8,916,562,915,239,978
  5. Step 5: Solve for x
    x = 8,916,562,915,239,978/81,693,007.70
  6. Step 6: Final answer
    x = 109,147,198.35

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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.