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Finding the Fourth Proportional to 74,207.88, 111,311.82 and 21,621.48

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Solution

The fourth proportional to 74,207.88, 111,311.82 and 21,621.48 is: 32,432.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,207.88 : 111,311.82 = 21,621.48 : x
  2. Step 2: Convert to fraction form
    74,207.88/111,311.82 = 21,621.48/x
  3. Step 3: Cross multiply
    74,207.88x = 111,311.82 × 21,621.48
  4. Step 4: Simplify right side
    74,207.88x = 2,406,726,289.89
  5. Step 5: Solve for x
    x = 2,406,726,289.89/74,207.88
  6. Step 6: Final answer
    x = 32,432.22

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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.