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Finding the Fourth Proportional to 108,100.70, 162,180.78 and 51,987.75

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Solution

The fourth proportional to 108,100.70, 162,180.78 and 51,987.75 is: 77,995.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,100.70 : 162,180.78 = 51,987.75 : x
  2. Step 2: Convert to fraction form
    108,100.70/162,180.78 = 51,987.75/x
  3. Step 3: Cross multiply
    108,100.70x = 162,180.78 × 51,987.75
  4. Step 4: Simplify right side
    108,100.70x = 8,431,413,845.45
  5. Step 5: Solve for x
    x = 8,431,413,845.45/108,100.70
  6. Step 6: Final answer
    x = 77,995.92

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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.