Home / 216,121.95-324,231.17-66,377.39

Finding the Fourth Proportional to 216,121.95, 324,231.17 and 66,377.39

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Solution

The fourth proportional to 216,121.95, 324,231.17 and 66,377.39 is: 99,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,121.95 : 324,231.17 = 66,377.39 : x
  2. Step 2: Convert to fraction form
    216,121.95/324,231.17 = 66,377.39/x
  3. Step 3: Cross multiply
    216,121.95x = 324,231.17 × 66,377.39
  4. Step 4: Simplify right side
    216,121.95x = 21,521,616,868.20
  5. Step 5: Solve for x
    x = 21,521,616,868.20/216,121.95
  6. Step 6: Final answer
    x = 99,580.89

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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.