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Finding the Fourth Proportional to 123,892.07, 170,968.19 and 72,205.88

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Solution

The fourth proportional to 123,892.07, 170,968.19 and 72,205.88 is: 99,642.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,892.07 : 170,968.19 = 72,205.88 : x
  2. Step 2: Convert to fraction form
    123,892.07/170,968.19 = 72,205.88/x
  3. Step 3: Cross multiply
    123,892.07x = 170,968.19 × 72,205.88
  4. Step 4: Simplify right side
    123,892.07x = 12,344,907,395.09
  5. Step 5: Solve for x
    x = 12,344,907,395.09/123,892.07
  6. Step 6: Final answer
    x = 99,642.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.