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Finding the Fourth Proportional to 108,700.20, 163,031.46 and 28,738.86

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Solution

The fourth proportional to 108,700.20, 163,031.46 and 28,738.86 is: 43,103.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,700.20 : 163,031.46 = 28,738.86 : x
  2. Step 2: Convert to fraction form
    108,700.20/163,031.46 = 28,738.86/x
  3. Step 3: Cross multiply
    108,700.20x = 163,031.46 × 28,738.86
  4. Step 4: Simplify right side
    108,700.20x = 4,685,338,304.54
  5. Step 5: Solve for x
    x = 4,685,338,304.54/108,700.20
  6. Step 6: Final answer
    x = 43,103.31

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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.