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Finding the Fourth Proportional to 191,999.88, 287,583.84 and 139,293

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Solution

The fourth proportional to 191,999.88, 287,583.84 and 139,293 is: 208,637.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,999.88 : 287,583.84 = 139,293 : x
  2. Step 2: Convert to fraction form
    191,999.88/287,583.84 = 139,293/x
  3. Step 3: Cross multiply
    191,999.88x = 287,583.84 × 139,293
  4. Step 4: Simplify right side
    191,999.88x = 40,058,415,825.12
  5. Step 5: Solve for x
    x = 40,058,415,825.12/191,999.88
  6. Step 6: Final answer
    x = 208,637.71

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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.