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Finding the Fourth Proportional to 67,032.88, 100,554 and 20,289.28

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Solution

The fourth proportional to 67,032.88, 100,554 and 20,289.28 is: 30,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,032.88 : 100,554 = 20,289.28 : x
  2. Step 2: Convert to fraction form
    67,032.88/100,554 = 20,289.28/x
  3. Step 3: Cross multiply
    67,032.88x = 100,554 × 20,289.28
  4. Step 4: Simplify right side
    67,032.88x = 2,040,168,261.12
  5. Step 5: Solve for x
    x = 2,040,168,261.12/67,032.88
  6. Step 6: Final answer
    x = 30,435.34

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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.