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Finding the Fourth Proportional to 73,138.01, 109,711.26 and 20,551.59

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Solution

The fourth proportional to 73,138.01, 109,711.26 and 20,551.59 is: 30,828.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,138.01 : 109,711.26 = 20,551.59 : x
  2. Step 2: Convert to fraction form
    73,138.01/109,711.26 = 20,551.59/x
  3. Step 3: Cross multiply
    73,138.01x = 109,711.26 × 20,551.59
  4. Step 4: Simplify right side
    73,138.01x = 2,254,740,833.90
  5. Step 5: Solve for x
    x = 2,254,740,833.90/73,138.01
  6. Step 6: Final answer
    x = 30,828.58

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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.