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Finding the Fourth Proportional to 489,195,940.80, 733,793,911.20 and 166,079,812.80

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Solution

The fourth proportional to 489,195,940.80, 733,793,911.20 and 166,079,812.80 is: 249,119,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,195,940.80 : 733,793,911.20 = 166,079,812.80 : x
  2. Step 2: Convert to fraction form
    489,195,940.80/733,793,911.20 = 166,079,812.80/x
  3. Step 3: Cross multiply
    489,195,940.80x = 733,793,911.20 × 166,079,812.80
  4. Step 4: Simplify right side
    489,195,940.80x = 121,868,355,405,875,840
  5. Step 5: Solve for x
    x = 121,868,355,405,875,840/489,195,940.80
  6. Step 6: Final answer
    x = 249,119,719.20

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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.