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Finding the Fourth Proportional to 79,987.72, 120,003.83 and 35,001.06

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Solution

The fourth proportional to 79,987.72, 120,003.83 and 35,001.06 is: 52,511.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,987.72 : 120,003.83 = 35,001.06 : x
  2. Step 2: Convert to fraction form
    79,987.72/120,003.83 = 35,001.06/x
  3. Step 3: Cross multiply
    79,987.72x = 120,003.83 × 35,001.06
  4. Step 4: Simplify right side
    79,987.72x = 4,200,261,435.32
  5. Step 5: Solve for x
    x = 4,200,261,435.32/79,987.72
  6. Step 6: Final answer
    x = 52,511.33

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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.