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Finding the Fourth Proportional to 192,616.70, 288,730.65 and 87,511.10

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Solution

The fourth proportional to 192,616.70, 288,730.65 and 87,511.10 is: 131,178.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,616.70 : 288,730.65 = 87,511.10 : x
  2. Step 2: Convert to fraction form
    192,616.70/288,730.65 = 87,511.10/x
  3. Step 3: Cross multiply
    192,616.70x = 288,730.65 × 87,511.10
  4. Step 4: Simplify right side
    192,616.70x = 25,267,136,785.22
  5. Step 5: Solve for x
    x = 25,267,136,785.22/192,616.70
  6. Step 6: Final answer
    x = 131,178.33

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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.