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Finding the Fourth Proportional to 137,393.56, 189,279.42 and 129,126.70

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Solution

The fourth proportional to 137,393.56, 189,279.42 and 129,126.70 is: 177,890.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,393.56 : 189,279.42 = 129,126.70 : x
  2. Step 2: Convert to fraction form
    137,393.56/189,279.42 = 129,126.70/x
  3. Step 3: Cross multiply
    137,393.56x = 189,279.42 × 129,126.70
  4. Step 4: Simplify right side
    137,393.56x = 24,441,026,882.51
  5. Step 5: Solve for x
    x = 24,441,026,882.51/137,393.56
  6. Step 6: Final answer
    x = 177,890.63

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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.