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Finding the Fourth Proportional to 123,100, 169,887.72 and 68,659.90

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Solution

The fourth proportional to 123,100, 169,887.72 and 68,659.90 is: 94,756.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,100 : 169,887.72 = 68,659.90 : x
  2. Step 2: Convert to fraction form
    123,100/169,887.72 = 68,659.90/x
  3. Step 3: Cross multiply
    123,100x = 169,887.72 × 68,659.90
  4. Step 4: Simplify right side
    123,100x = 11,664,473,866.43
  5. Step 5: Solve for x
    x = 11,664,473,866.43/123,100
  6. Step 6: Final answer
    x = 94,756.08

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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.