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Finding the Fourth Proportional to 74,894.56, 112,310.79 and 30,491.17

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Solution

The fourth proportional to 74,894.56, 112,310.79 and 30,491.17 is: 45,724.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,894.56 : 112,310.79 = 30,491.17 : x
  2. Step 2: Convert to fraction form
    74,894.56/112,310.79 = 30,491.17/x
  3. Step 3: Cross multiply
    74,894.56x = 112,310.79 × 30,491.17
  4. Step 4: Simplify right side
    74,894.56x = 3,424,487,390.72
  5. Step 5: Solve for x
    x = 3,424,487,390.72/74,894.56
  6. Step 6: Final answer
    x = 45,724.11

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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.