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Finding the Fourth Proportional to 216,879.99, 325,335.20 and 67,100.57

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Solution

The fourth proportional to 216,879.99, 325,335.20 and 67,100.57 is: 100,655.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,879.99 : 325,335.20 = 67,100.57 : x
  2. Step 2: Convert to fraction form
    216,879.99/325,335.20 = 67,100.57/x
  3. Step 3: Cross multiply
    216,879.99x = 325,335.20 × 67,100.57
  4. Step 4: Simplify right side
    216,879.99x = 21,830,175,398.89
  5. Step 5: Solve for x
    x = 21,830,175,398.89/216,879.99
  6. Step 6: Final answer
    x = 100,655.55

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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.