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Finding the Fourth Proportional to 192,196.80, 288,295.20 and 139,052.70

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Solution

The fourth proportional to 192,196.80, 288,295.20 and 139,052.70 is: 208,579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,196.80 : 288,295.20 = 139,052.70 : x
  2. Step 2: Convert to fraction form
    192,196.80/288,295.20 = 139,052.70/x
  3. Step 3: Cross multiply
    192,196.80x = 288,295.20 × 139,052.70
  4. Step 4: Simplify right side
    192,196.80x = 40,088,225,957.04
  5. Step 5: Solve for x
    x = 40,088,225,957.04/192,196.80
  6. Step 6: Final answer
    x = 208,579.05

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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.