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Finding the Fourth Proportional to 192,511.80, 288,762.30 and 87,330.60

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Solution

The fourth proportional to 192,511.80, 288,762.30 and 87,330.60 is: 130,993.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,511.80 : 288,762.30 = 87,330.60 : x
  2. Step 2: Convert to fraction form
    192,511.80/288,762.30 = 87,330.60/x
  3. Step 3: Cross multiply
    192,511.80x = 288,762.30 × 87,330.60
  4. Step 4: Simplify right side
    192,511.80x = 25,217,784,916.38
  5. Step 5: Solve for x
    x = 25,217,784,916.38/192,511.80
  6. Step 6: Final answer
    x = 130,993.45

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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.