Home / 212,329.13-318,542.90-72,087.75

Finding the Fourth Proportional to 212,329.13, 318,542.90 and 72,087.75

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Solution

The fourth proportional to 212,329.13, 318,542.90 and 72,087.75 is: 108,148.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,329.13 : 318,542.90 = 72,087.75 : x
  2. Step 2: Convert to fraction form
    212,329.13/318,542.90 = 72,087.75/x
  3. Step 3: Cross multiply
    212,329.13x = 318,542.90 × 72,087.75
  4. Step 4: Simplify right side
    212,329.13x = 22,963,040,939.48
  5. Step 5: Solve for x
    x = 22,963,040,939.48/212,329.13
  6. Step 6: Final answer
    x = 108,148.33

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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.