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Finding the Fourth Proportional to 74,189.88, 111,285 and 21,600.64

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Solution

The fourth proportional to 74,189.88, 111,285 and 21,600.64 is: 32,401.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,189.88 : 111,285 = 21,600.64 : x
  2. Step 2: Convert to fraction form
    74,189.88/111,285 = 21,600.64/x
  3. Step 3: Cross multiply
    74,189.88x = 111,285 × 21,600.64
  4. Step 4: Simplify right side
    74,189.88x = 2,403,827,222.40
  5. Step 5: Solve for x
    x = 2,403,827,222.40/74,189.88
  6. Step 6: Final answer
    x = 32,401.01

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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.