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Finding the Fourth Proportional to 125,305.36, 172,921.32 and 68,717.94

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Solution

The fourth proportional to 125,305.36, 172,921.32 and 68,717.94 is: 94,830.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,305.36 : 172,921.32 = 68,717.94 : x
  2. Step 2: Convert to fraction form
    125,305.36/172,921.32 = 68,717.94/x
  3. Step 3: Cross multiply
    125,305.36x = 172,921.32 × 68,717.94
  4. Step 4: Simplify right side
    125,305.36x = 11,882,796,892.48
  5. Step 5: Solve for x
    x = 11,882,796,892.48/125,305.36
  6. Step 6: Final answer
    x = 94,830.72

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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.