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Finding the Fourth Proportional to 216,569.80, 324,636.63 and 90,279.97

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Solution

The fourth proportional to 216,569.80, 324,636.63 and 90,279.97 is: 135,329.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,569.80 : 324,636.63 = 90,279.97 : x
  2. Step 2: Convert to fraction form
    216,569.80/324,636.63 = 90,279.97/x
  3. Step 3: Cross multiply
    216,569.80x = 324,636.63 × 90,279.97
  4. Step 4: Simplify right side
    216,569.80x = 29,308,185,217.30
  5. Step 5: Solve for x
    x = 29,308,185,217.30/216,569.80
  6. Step 6: Final answer
    x = 135,329.05

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1.5x scale

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.