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Finding the Fourth Proportional to 140,388.91, 193,746.05 and 79,150.21

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Solution

The fourth proportional to 140,388.91, 193,746.05 and 79,150.21 is: 109,232.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,388.91 : 193,746.05 = 79,150.21 : x
  2. Step 2: Convert to fraction form
    140,388.91/193,746.05 = 79,150.21/x
  3. Step 3: Cross multiply
    140,388.91x = 193,746.05 × 79,150.21
  4. Step 4: Simplify right side
    140,388.91x = 15,335,040,544.17
  5. Step 5: Solve for x
    x = 15,335,040,544.17/140,388.91
  6. Step 6: Final answer
    x = 109,232.56

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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.