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Finding the Fourth Proportional to 216,690.39, 325,070.22 and 66,895.47

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Solution

The fourth proportional to 216,690.39, 325,070.22 and 66,895.47 is: 100,353.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,690.39 : 325,070.22 = 66,895.47 : x
  2. Step 2: Convert to fraction form
    216,690.39/325,070.22 = 66,895.47/x
  3. Step 3: Cross multiply
    216,690.39x = 325,070.22 × 66,895.47
  4. Step 4: Simplify right side
    216,690.39x = 21,745,725,149.90
  5. Step 5: Solve for x
    x = 21,745,725,149.90/216,690.39
  6. Step 6: Final answer
    x = 100,353.90

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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.