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Finding the Fourth Proportional to 192,096.40, 288,141.90 and 86,915.20

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Solution

The fourth proportional to 192,096.40, 288,141.90 and 86,915.20 is: 130,371.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,096.40 : 288,141.90 = 86,915.20 : x
  2. Step 2: Convert to fraction form
    192,096.40/288,141.90 = 86,915.20/x
  3. Step 3: Cross multiply
    192,096.40x = 288,141.90 × 86,915.20
  4. Step 4: Simplify right side
    192,096.40x = 25,043,910,866.88
  5. Step 5: Solve for x
    x = 25,043,910,866.88/192,096.40
  6. Step 6: Final answer
    x = 130,371.58

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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.