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Finding the Fourth Proportional to 216,855.90, 325,221.30 and 74,695.41

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Solution

The fourth proportional to 216,855.90, 325,221.30 and 74,695.41 is: 112,021.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,855.90 : 325,221.30 = 74,695.41 : x
  2. Step 2: Convert to fraction form
    216,855.90/325,221.30 = 74,695.41/x
  3. Step 3: Cross multiply
    216,855.90x = 325,221.30 × 74,695.41
  4. Step 4: Simplify right side
    216,855.90x = 24,292,538,344.23
  5. Step 5: Solve for x
    x = 24,292,538,344.23/216,855.90
  6. Step 6: Final answer
    x = 112,021.57

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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.