Home / 388,215,974.34-582,329,109.87-129,431,277.54

Finding the Fourth Proportional to 388,215,974.34, 582,329,109.87 and 129,431,277.54

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Solution

The fourth proportional to 388,215,974.34, 582,329,109.87 and 129,431,277.54 is: 194,148,632.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,215,974.34 : 582,329,109.87 = 129,431,277.54 : x
  2. Step 2: Convert to fraction form
    388,215,974.34/582,329,109.87 = 129,431,277.54/x
  3. Step 3: Cross multiply
    388,215,974.34x = 582,329,109.87 × 129,431,277.54
  4. Step 4: Simplify right side
    388,215,974.34x = 75,371,600,639,205,120
  5. Step 5: Solve for x
    x = 75,371,600,639,205,120/388,215,974.34
  6. Step 6: Final answer
    x = 194,148,632.77

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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.