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Finding the Fourth Proportional to 74,010.84, 111,034.49 and 21,425.64

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Solution

The fourth proportional to 74,010.84, 111,034.49 and 21,425.64 is: 32,143.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,010.84 : 111,034.49 = 21,425.64 : x
  2. Step 2: Convert to fraction form
    74,010.84/111,034.49 = 21,425.64/x
  3. Step 3: Cross multiply
    74,010.84x = 111,034.49 × 21,425.64
  4. Step 4: Simplify right side
    74,010.84x = 2,378,984,903.20
  5. Step 5: Solve for x
    x = 2,378,984,903.20/74,010.84
  6. Step 6: Final answer
    x = 32,143.74

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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.