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Finding the Fourth Proportional to 281,720.43, 388,731.17 and 159,168.08

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Solution

The fourth proportional to 281,720.43, 388,731.17 and 159,168.08 is: 219,627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,720.43 : 388,731.17 = 159,168.08 : x
  2. Step 2: Convert to fraction form
    281,720.43/388,731.17 = 159,168.08/x
  3. Step 3: Cross multiply
    281,720.43x = 388,731.17 × 159,168.08
  4. Step 4: Simplify right side
    281,720.43x = 61,873,591,225.56
  5. Step 5: Solve for x
    x = 61,873,591,225.56/281,720.43
  6. Step 6: Final answer
    x = 219,627.63

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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.