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Finding the Fourth Proportional to 137,947.22, 206,773.72 and 78,655.22

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Solution

The fourth proportional to 137,947.22, 206,773.72 and 78,655.22 is: 117,898.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,947.22 : 206,773.72 = 78,655.22 : x
  2. Step 2: Convert to fraction form
    137,947.22/206,773.72 = 78,655.22/x
  3. Step 3: Cross multiply
    137,947.22x = 206,773.72 × 78,655.22
  4. Step 4: Simplify right side
    137,947.22x = 16,263,832,436.82
  5. Step 5: Solve for x
    x = 16,263,832,436.82/137,947.22
  6. Step 6: Final answer
    x = 117,898.95

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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.