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Finding the Fourth Proportional to 261,996.78, 393,018.93 and 72,469.02

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Solution

The fourth proportional to 261,996.78, 393,018.93 and 72,469.02 is: 108,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,996.78 : 393,018.93 = 72,469.02 : x
  2. Step 2: Convert to fraction form
    261,996.78/393,018.93 = 72,469.02/x
  3. Step 3: Cross multiply
    261,996.78x = 393,018.93 × 72,469.02
  4. Step 4: Simplify right side
    261,996.78x = 28,481,696,698.55
  5. Step 5: Solve for x
    x = 28,481,696,698.55/261,996.78
  6. Step 6: Final answer
    x = 108,710.10

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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.