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Finding the Fourth Proportional to 125,721.55, 188,706.26 and 92,347.93

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Solution

The fourth proportional to 125,721.55, 188,706.26 and 92,347.93 is: 138,612.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,721.55 : 188,706.26 = 92,347.93 : x
  2. Step 2: Convert to fraction form
    125,721.55/188,706.26 = 92,347.93/x
  3. Step 3: Cross multiply
    125,721.55x = 188,706.26 × 92,347.93
  4. Step 4: Simplify right side
    125,721.55x = 17,426,632,436.34
  5. Step 5: Solve for x
    x = 17,426,632,436.34/125,721.55
  6. Step 6: Final answer
    x = 138,612.93

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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.