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Finding the Fourth Proportional to 137,889.96, 206,879.50 and 67,720.06

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Solution

The fourth proportional to 137,889.96, 206,879.50 and 67,720.06 is: 101,601.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,889.96 : 206,879.50 = 67,720.06 : x
  2. Step 2: Convert to fraction form
    137,889.96/206,879.50 = 67,720.06/x
  3. Step 3: Cross multiply
    137,889.96x = 206,879.50 × 67,720.06
  4. Step 4: Simplify right side
    137,889.96x = 14,009,892,152.77
  5. Step 5: Solve for x
    x = 14,009,892,152.77/137,889.96
  6. Step 6: Final answer
    x = 101,601.97

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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.