Home / 138,601.17-191,269.35-78,171.63

Finding the Fourth Proportional to 138,601.17, 191,269.35 and 78,171.63

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Solution

The fourth proportional to 138,601.17, 191,269.35 and 78,171.63 is: 107,876.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.17 : 191,269.35 = 78,171.63 : x
  2. Step 2: Convert to fraction form
    138,601.17/191,269.35 = 78,171.63/x
  3. Step 3: Cross multiply
    138,601.17x = 191,269.35 × 78,171.63
  4. Step 4: Simplify right side
    138,601.17x = 14,951,836,858.54
  5. Step 5: Solve for x
    x = 14,951,836,858.54/138,601.17
  6. Step 6: Final answer
    x = 107,876.70

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1.5x scale

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.