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Finding the Fourth Proportional to 216,982.80, 325,425.60 and 142,624.80

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Solution

The fourth proportional to 216,982.80, 325,425.60 and 142,624.80 is: 213,905.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,982.80 : 325,425.60 = 142,624.80 : x
  2. Step 2: Convert to fraction form
    216,982.80/325,425.60 = 142,624.80/x
  3. Step 3: Cross multiply
    216,982.80x = 325,425.60 × 142,624.80
  4. Step 4: Simplify right side
    216,982.80x = 46,413,761,114.88
  5. Step 5: Solve for x
    x = 46,413,761,114.88/216,982.80
  6. Step 6: Final answer
    x = 213,905.25

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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.