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Finding the Fourth Proportional to 123,489.67, 170,423.62 and 75,736.53

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Solution

The fourth proportional to 123,489.67, 170,423.62 and 75,736.53 is: 104,521.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,489.67 : 170,423.62 = 75,736.53 : x
  2. Step 2: Convert to fraction form
    123,489.67/170,423.62 = 75,736.53/x
  3. Step 3: Cross multiply
    123,489.67x = 170,423.62 × 75,736.53
  4. Step 4: Simplify right side
    123,489.67x = 12,907,293,608.84
  5. Step 5: Solve for x
    x = 12,907,293,608.84/123,489.67
  6. Step 6: Final answer
    x = 104,521.24

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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.