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Finding the Fourth Proportional to 74,979.78, 112,469.65 and 30,021.37

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Solution

The fourth proportional to 74,979.78, 112,469.65 and 30,021.37 is: 45,032.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.78 : 112,469.65 = 30,021.37 : x
  2. Step 2: Convert to fraction form
    74,979.78/112,469.65 = 30,021.37/x
  3. Step 3: Cross multiply
    74,979.78x = 112,469.65 × 30,021.37
  4. Step 4: Simplify right side
    74,979.78x = 3,376,492,620.19
  5. Step 5: Solve for x
    x = 3,376,492,620.19/74,979.78
  6. Step 6: Final answer
    x = 45,032.04

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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.