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Finding the Fourth Proportional to 61,061.03, 91,604.61 and 18,940.19

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Solution

The fourth proportional to 61,061.03, 91,604.61 and 18,940.19 is: 28,414.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,061.03 : 91,604.61 = 18,940.19 : x
  2. Step 2: Convert to fraction form
    61,061.03/91,604.61 = 18,940.19/x
  3. Step 3: Cross multiply
    61,061.03x = 91,604.61 × 18,940.19
  4. Step 4: Simplify right side
    61,061.03x = 1,735,008,718.28
  5. Step 5: Solve for x
    x = 1,735,008,718.28/61,061.03
  6. Step 6: Final answer
    x = 28,414.34

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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.