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Finding the Fourth Proportional to 125,259, 172,857.42 and 68,670.78

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Solution

The fourth proportional to 125,259, 172,857.42 and 68,670.78 is: 94,765.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,259 : 172,857.42 = 68,670.78 : x
  2. Step 2: Convert to fraction form
    125,259/172,857.42 = 68,670.78/x
  3. Step 3: Cross multiply
    125,259x = 172,857.42 × 68,670.78
  4. Step 4: Simplify right side
    125,259x = 11,870,253,860.19
  5. Step 5: Solve for x
    x = 11,870,253,860.19/125,259
  6. Step 6: Final answer
    x = 94,765.68

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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.