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Finding the Fourth Proportional to 127,630.10, 191,465.91 and 43,397.80

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Solution

The fourth proportional to 127,630.10, 191,465.91 and 43,397.80 is: 65,103.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,630.10 : 191,465.91 = 43,397.80 : x
  2. Step 2: Convert to fraction form
    127,630.10/191,465.91 = 43,397.80/x
  3. Step 3: Cross multiply
    127,630.10x = 191,465.91 × 43,397.80
  4. Step 4: Simplify right side
    127,630.10x = 8,309,198,790.33
  5. Step 5: Solve for x
    x = 8,309,198,790.33/127,630.10
  6. Step 6: Final answer
    x = 65,103.75

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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.