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Finding the Fourth Proportional to 60,600.54, 90,905.67 and 21,156.78

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Solution

The fourth proportional to 60,600.54, 90,905.67 and 21,156.78 is: 31,736.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,600.54 : 90,905.67 = 21,156.78 : x
  2. Step 2: Convert to fraction form
    60,600.54/90,905.67 = 21,156.78/x
  3. Step 3: Cross multiply
    60,600.54x = 90,905.67 × 21,156.78
  4. Step 4: Simplify right side
    60,600.54x = 1,923,271,260.94
  5. Step 5: Solve for x
    x = 1,923,271,260.94/60,600.54
  6. Step 6: Final answer
    x = 31,736.87

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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.