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Finding the Fourth Proportional to 60,469.29, 90,720.27 and 21,028.59

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Solution

The fourth proportional to 60,469.29, 90,720.27 and 21,028.59 is: 31,548.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,469.29 : 90,720.27 = 21,028.59 : x
  2. Step 2: Convert to fraction form
    60,469.29/90,720.27 = 21,028.59/x
  3. Step 3: Cross multiply
    60,469.29x = 90,720.27 × 21,028.59
  4. Step 4: Simplify right side
    60,469.29x = 1,907,719,362.52
  5. Step 5: Solve for x
    x = 1,907,719,362.52/60,469.29
  6. Step 6: Final answer
    x = 31,548.57

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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.