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Finding the Fourth Proportional to 123,489.77, 170,424.41 and 75,110.59

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Solution

The fourth proportional to 123,489.77, 170,424.41 and 75,110.59 is: 103,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,489.77 : 170,424.41 = 75,110.59 : x
  2. Step 2: Convert to fraction form
    123,489.77/170,424.41 = 75,110.59/x
  3. Step 3: Cross multiply
    123,489.77x = 170,424.41 × 75,110.59
  4. Step 4: Simplify right side
    123,489.77x = 12,800,677,822.98
  5. Step 5: Solve for x
    x = 12,800,677,822.98/123,489.77
  6. Step 6: Final answer
    x = 103,657.80

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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.