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Finding the Fourth Proportional to 127,392.80, 191,175.60 and 82,911.20

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Solution

The fourth proportional to 127,392.80, 191,175.60 and 82,911.20 is: 124,423.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,392.80 : 191,175.60 = 82,911.20 : x
  2. Step 2: Convert to fraction form
    127,392.80/191,175.60 = 82,911.20/x
  3. Step 3: Cross multiply
    127,392.80x = 191,175.60 × 82,911.20
  4. Step 4: Simplify right side
    127,392.80x = 15,850,598,406.72
  5. Step 5: Solve for x
    x = 15,850,598,406.72/127,392.80
  6. Step 6: Final answer
    x = 124,423.03

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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.