Home / 81,693,037.70-122,539,556.55-72,764,828.90

Finding the Fourth Proportional to 81,693,037.70, 122,539,556.55 and 72,764,828.90

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Solution

The fourth proportional to 81,693,037.70, 122,539,556.55 and 72,764,828.90 is: 109,147,243.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693,037.70 : 122,539,556.55 = 72,764,828.90 : x
  2. Step 2: Convert to fraction form
    81,693,037.70/122,539,556.55 = 72,764,828.90/x
  3. Step 3: Cross multiply
    81,693,037.70x = 122,539,556.55 × 72,764,828.90
  4. Step 4: Simplify right side
    81,693,037.70x = 8,916,569,865,842,625
  5. Step 5: Solve for x
    x = 8,916,569,865,842,625/81,693,037.70
  6. Step 6: Final answer
    x = 109,147,243.35

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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.