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Finding the Fourth Proportional to 137,388.26, 189,586.59 and 76,944.98

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Solution

The fourth proportional to 137,388.26, 189,586.59 and 76,944.98 is: 106,178.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,388.26 : 189,586.59 = 76,944.98 : x
  2. Step 2: Convert to fraction form
    137,388.26/189,586.59 = 76,944.98/x
  3. Step 3: Cross multiply
    137,388.26x = 189,586.59 × 76,944.98
  4. Step 4: Simplify right side
    137,388.26x = 14,587,736,375.82
  5. Step 5: Solve for x
    x = 14,587,736,375.82/137,388.26
  6. Step 6: Final answer
    x = 106,178.91

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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.