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Finding the Fourth Proportional to 74,987.69, 112,481.42 and 30,029.29

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Solution

The fourth proportional to 74,987.69, 112,481.42 and 30,029.29 is: 45,043.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,987.69 : 112,481.42 = 30,029.29 : x
  2. Step 2: Convert to fraction form
    74,987.69/112,481.42 = 30,029.29/x
  3. Step 3: Cross multiply
    74,987.69x = 112,481.42 × 30,029.29
  4. Step 4: Simplify right side
    74,987.69x = 3,377,736,749.44
  5. Step 5: Solve for x
    x = 3,377,736,749.44/74,987.69
  6. Step 6: Final answer
    x = 45,043.89

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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.