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Finding the Fourth Proportional to 192,706.89, 288,988.51 and 66,311.79

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Solution

The fourth proportional to 192,706.89, 288,988.51 and 66,311.79 is: 99,442.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,706.89 : 288,988.51 = 66,311.79 : x
  2. Step 2: Convert to fraction form
    192,706.89/288,988.51 = 66,311.79/x
  3. Step 3: Cross multiply
    192,706.89x = 288,988.51 × 66,311.79
  4. Step 4: Simplify right side
    192,706.89x = 19,163,345,387.53
  5. Step 5: Solve for x
    x = 19,163,345,387.53/192,706.89
  6. Step 6: Final answer
    x = 99,442.97

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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.