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Finding the Fourth Proportional to 125,143.14, 172,698.14 and 68,554.51

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Solution

The fourth proportional to 125,143.14, 172,698.14 and 68,554.51 is: 94,605.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,143.14 : 172,698.14 = 68,554.51 : x
  2. Step 2: Convert to fraction form
    125,143.14/172,698.14 = 68,554.51/x
  3. Step 3: Cross multiply
    125,143.14x = 172,698.14 × 68,554.51
  4. Step 4: Simplify right side
    125,143.14x = 11,839,236,365.61
  5. Step 5: Solve for x
    x = 11,839,236,365.61/125,143.14
  6. Step 6: Final answer
    x = 94,605.56

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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.