Home / 138,153.20-206,958.65-71,636.81

Finding the Fourth Proportional to 138,153.20, 206,958.65 and 71,636.81

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Solution

The fourth proportional to 138,153.20, 206,958.65 and 71,636.81 is: 107,314.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,153.20 : 206,958.65 = 71,636.81 : x
  2. Step 2: Convert to fraction form
    138,153.20/206,958.65 = 71,636.81/x
  3. Step 3: Cross multiply
    138,153.20x = 206,958.65 × 71,636.81
  4. Step 4: Simplify right side
    138,153.20x = 14,825,856,094.93
  5. Step 5: Solve for x
    x = 14,825,856,094.93/138,153.20
  6. Step 6: Final answer
    x = 107,314.61

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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.