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Finding the Fourth Proportional to 125,098.97, 172,636.64 and 67,738.32

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Solution

The fourth proportional to 125,098.97, 172,636.64 and 67,738.32 is: 93,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,098.97 : 172,636.64 = 67,738.32 : x
  2. Step 2: Convert to fraction form
    125,098.97/172,636.64 = 67,738.32/x
  3. Step 3: Cross multiply
    125,098.97x = 172,636.64 × 67,738.32
  4. Step 4: Simplify right side
    125,098.97x = 11,694,115,016.19
  5. Step 5: Solve for x
    x = 11,694,115,016.19/125,098.97
  6. Step 6: Final answer
    x = 93,478.91

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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.