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Finding the Fourth Proportional to 123,687.99, 170,689.86 and 67,099.77

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Solution

The fourth proportional to 123,687.99, 170,689.86 and 67,099.77 is: 92,597.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,687.99 : 170,689.86 = 67,099.77 : x
  2. Step 2: Convert to fraction form
    123,687.99/170,689.86 = 67,099.77/x
  3. Step 3: Cross multiply
    123,687.99x = 170,689.86 × 67,099.77
  4. Step 4: Simplify right side
    123,687.99x = 11,453,250,347.33
  5. Step 5: Solve for x
    x = 11,453,250,347.33/123,687.99
  6. Step 6: Final answer
    x = 92,597.92

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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.