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Finding the Fourth Proportional to 125,116.88, 172,661.30 and 68,530.28

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Solution

The fourth proportional to 125,116.88, 172,661.30 and 68,530.28 is: 94,571.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,116.88 : 172,661.30 = 68,530.28 : x
  2. Step 2: Convert to fraction form
    125,116.88/172,661.30 = 68,530.28/x
  3. Step 3: Cross multiply
    125,116.88x = 172,661.30 × 68,530.28
  4. Step 4: Simplify right side
    125,116.88x = 11,832,526,028.21
  5. Step 5: Solve for x
    x = 11,832,526,028.21/125,116.88
  6. Step 6: Final answer
    x = 94,571.78

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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.