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Finding the Fourth Proportional to 125,238.90, 172,828.68 and 68,650.14

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Solution

The fourth proportional to 125,238.90, 172,828.68 and 68,650.14 is: 94,736.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,238.90 : 172,828.68 = 68,650.14 : x
  2. Step 2: Convert to fraction form
    125,238.90/172,828.68 = 68,650.14/x
  3. Step 3: Cross multiply
    125,238.90x = 172,828.68 × 68,650.14
  4. Step 4: Simplify right side
    125,238.90x = 11,864,713,078.02
  5. Step 5: Solve for x
    x = 11,864,713,078.02/125,238.90
  6. Step 6: Final answer
    x = 94,736.64

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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.