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Finding the Fourth Proportional to 125,398.62, 188,054.19 and 55,239.66

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Solution

The fourth proportional to 125,398.62, 188,054.19 and 55,239.66 is: 82,840.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,398.62 : 188,054.19 = 55,239.66 : x
  2. Step 2: Convert to fraction form
    125,398.62/188,054.19 = 55,239.66/x
  3. Step 3: Cross multiply
    125,398.62x = 188,054.19 × 55,239.66
  4. Step 4: Simplify right side
    125,398.62x = 10,388,049,517.18
  5. Step 5: Solve for x
    x = 10,388,049,517.18/125,398.62
  6. Step 6: Final answer
    x = 82,840.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.