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Finding the Fourth Proportional to 137,625.78, 189,908.37 and 77,183.97

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Solution

The fourth proportional to 137,625.78, 189,908.37 and 77,183.97 is: 106,505.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,625.78 : 189,908.37 = 77,183.97 : x
  2. Step 2: Convert to fraction form
    137,625.78/189,908.37 = 77,183.97/x
  3. Step 3: Cross multiply
    137,625.78x = 189,908.37 × 77,183.97
  4. Step 4: Simplify right side
    137,625.78x = 14,657,881,932.83
  5. Step 5: Solve for x
    x = 14,657,881,932.83/137,625.78
  6. Step 6: Final answer
    x = 106,505.35

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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.