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Finding the Fourth Proportional to 118,889.86, 178,335.47 and 30,143.56

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Solution

The fourth proportional to 118,889.86, 178,335.47 and 30,143.56 is: 45,215.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,889.86 : 178,335.47 = 30,143.56 : x
  2. Step 2: Convert to fraction form
    118,889.86/178,335.47 = 30,143.56/x
  3. Step 3: Cross multiply
    118,889.86x = 178,335.47 × 30,143.56
  4. Step 4: Simplify right side
    118,889.86x = 5,375,665,940.07
  5. Step 5: Solve for x
    x = 5,375,665,940.07/118,889.86
  6. Step 6: Final answer
    x = 45,215.51

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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.