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Finding the Fourth Proportional to 60,391.62, 90,564.75 and 20,939.22

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Solution

The fourth proportional to 60,391.62, 90,564.75 and 20,939.22 is: 31,400.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,391.62 : 90,564.75 = 20,939.22 : x
  2. Step 2: Convert to fraction form
    60,391.62/90,564.75 = 20,939.22/x
  3. Step 3: Cross multiply
    60,391.62x = 90,564.75 × 20,939.22
  4. Step 4: Simplify right side
    60,391.62x = 1,896,355,224.50
  5. Step 5: Solve for x
    x = 1,896,355,224.50/60,391.62
  6. Step 6: Final answer
    x = 31,400.97

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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.