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Finding the Fourth Proportional to 74,804.28, 112,109.44 and 30,379

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Solution

The fourth proportional to 74,804.28, 112,109.44 and 30,379 is: 45,529.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,804.28 : 112,109.44 = 30,379 : x
  2. Step 2: Convert to fraction form
    74,804.28/112,109.44 = 30,379/x
  3. Step 3: Cross multiply
    74,804.28x = 112,109.44 × 30,379
  4. Step 4: Simplify right side
    74,804.28x = 3,405,772,677.76
  5. Step 5: Solve for x
    x = 3,405,772,677.76/74,804.28
  6. Step 6: Final answer
    x = 45,529.12

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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.