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Finding the Fourth Proportional to 125,661.89, 173,251.72 and 102,917.09

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Solution

The fourth proportional to 125,661.89, 173,251.72 and 102,917.09 is: 141,893.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,661.89 : 173,251.72 = 102,917.09 : x
  2. Step 2: Convert to fraction form
    125,661.89/173,251.72 = 102,917.09/x
  3. Step 3: Cross multiply
    125,661.89x = 173,251.72 × 102,917.09
  4. Step 4: Simplify right side
    125,661.89x = 17,830,562,859.89
  5. Step 5: Solve for x
    x = 17,830,562,859.89/125,661.89
  6. Step 6: Final answer
    x = 141,893.16

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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.