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Finding the Fourth Proportional to 74,623.80, 111,935.02 and 30,240

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Solution

The fourth proportional to 74,623.80, 111,935.02 and 30,240 is: 45,359.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,623.80 : 111,935.02 = 30,240 : x
  2. Step 2: Convert to fraction form
    74,623.80/111,935.02 = 30,240/x
  3. Step 3: Cross multiply
    74,623.80x = 111,935.02 × 30,240
  4. Step 4: Simplify right side
    74,623.80x = 3,384,915,004.80
  5. Step 5: Solve for x
    x = 3,384,915,004.80/74,623.80
  6. Step 6: Final answer
    x = 45,359.72

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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.