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Finding the Fourth Proportional to 123,711.68, 170,717.54 and 67,121.84

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Solution

The fourth proportional to 123,711.68, 170,717.54 and 67,121.84 is: 92,625.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,711.68 : 170,717.54 = 67,121.84 : x
  2. Step 2: Convert to fraction form
    123,711.68/170,717.54 = 67,121.84/x
  3. Step 3: Cross multiply
    123,711.68x = 170,717.54 × 67,121.84
  4. Step 4: Simplify right side
    123,711.68x = 11,458,875,405.07
  5. Step 5: Solve for x
    x = 11,458,875,405.07/123,711.68
  6. Step 6: Final answer
    x = 92,625.66

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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.