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Finding the Fourth Proportional to 216,982.40, 325,665.60 and 128,124.80

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Solution

The fourth proportional to 216,982.40, 325,665.60 and 128,124.80 is: 192,300.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,982.40 : 325,665.60 = 128,124.80 : x
  2. Step 2: Convert to fraction form
    216,982.40/325,665.60 = 128,124.80/x
  3. Step 3: Cross multiply
    216,982.40x = 325,665.60 × 128,124.80
  4. Step 4: Simplify right side
    216,982.40x = 41,725,839,866.88
  5. Step 5: Solve for x
    x = 41,725,839,866.88/216,982.40
  6. Step 6: Final answer
    x = 192,300.57

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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.