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Finding the Fourth Proportional to 61,230.54, 91,845.81 and 19,680.78

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Solution

The fourth proportional to 61,230.54, 91,845.81 and 19,680.78 is: 29,521.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,230.54 : 91,845.81 = 19,680.78 : x
  2. Step 2: Convert to fraction form
    61,230.54/91,845.81 = 19,680.78/x
  3. Step 3: Cross multiply
    61,230.54x = 91,845.81 × 19,680.78
  4. Step 4: Simplify right side
    61,230.54x = 1,807,597,180.53
  5. Step 5: Solve for x
    x = 1,807,597,180.53/61,230.54
  6. Step 6: Final answer
    x = 29,521.17

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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.