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Finding the Fourth Proportional to 125,258.70, 172,863.63 and 68,672.46

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Solution

The fourth proportional to 125,258.70, 172,863.63 and 68,672.46 is: 94,771.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,258.70 : 172,863.63 = 68,672.46 : x
  2. Step 2: Convert to fraction form
    125,258.70/172,863.63 = 68,672.46/x
  3. Step 3: Cross multiply
    125,258.70x = 172,863.63 × 68,672.46
  4. Step 4: Simplify right side
    125,258.70x = 11,870,970,716.63
  5. Step 5: Solve for x
    x = 11,870,970,716.63/125,258.70
  6. Step 6: Final answer
    x = 94,771.63

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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.